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What are Bifocal Glasses?

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What are Bifocal Glasses?

Bifocal glasses have come a long way since the 1700s when Benjamin Franklin created the first pair. He coined them “double spectacles,” as they contained two different types of lenses in one pair of glasses. If you’re tired of constantly switching between glasses, bifocals might be the solution. And don’t worry, the lenses and style have significantly evolved since Ben Franklin’s pair. 

What are bifocals? 

Bifocals are unique multifocal lenses that allow you to have one pair of prescription glasses that can improve both near and far eyesight. If you look closely at bifocal lenses, you may notice a difference between the long-distance and close-range lenses, and that’s because they are two different prescriptions. To others looking at you, the difference is almost undetectable. This lens is designed to work as both reading and prescription glasses, all in one frame. 

How do bifocal lenses work?

The lens is divided in two, the larger part of the lens, located at the top, is for seeing long-distance. It can help you see far away, read street signs or watch television from across the room. The smaller part, located at the bottom of the lens, allows for improved close-up vision. This part enables you to check your smartphone or read a book. Bifocal lenses may take some time to adjust, but they are easy to use. You use bifocals by moving your eyes depending on the distance you wish to see. Generally, you look up and through the larger portion when looking farther away, and you look down through the smaller segment when focusing on objects nearer to your eyes. 

Bifocals are an excellent option for people with presbyopia, an age-related loss of the eyes’ ability to focus on nearby objects. Bifocals can also be worn with contact lenses, making them a versatile option for many. 

Bifocal vs progressive lenses

Both bifocal and progressive lenses allow you to transition from near to far prescriptions all in one lens. Both can also be used as a solution for presbyopia and provide comfortable vision for people with multiple prescriptions. While similar, there are a few distinct differences between the two. 

Bifocal lenses

  1. Two vision segments (one for near and one for distance vision)
  2. Has a distinct line separating the segments
  3. May cause difficulty reading a computer screen 

Progressive lenses 

  1. Progression between all distances (near, intermediate and far vision)
  2. No distinction between distance powers in the lens (no line)
  3. Middle segment for better computer vision 

While many immediately choose a progressive lens because of the seamless transition, some find the strong distinction between prescriptions in a bifocal lens more comfortable. It is important to consider your lifestyle and preference when choosing your lenses. If you’re curious or want more information, visit our Optical Centre and speak with one of our opticians. 

 

Advantages and disadvantages of bifocal lenses

As is the case with most things, bifocal lenses have advantages and disadvantages. It is important to remember that everyone has different needs when it comes to glasses. Speaking with an optician and finding the right lenses is just as important as how they look. 

Advantages

  1. One pair of glasses for near and far vision 
  2. Typically more affordable than progressive lenses 
  3. May be easier to adjust to than progressive lenses 

Disadvantages 

  1. Distinct separation lines may be distracting or “unfashionable”
  2. Visual distortion is more likely than wearing two separate pairs of glasses 
  3. They may take more time to adjust to than single vision glasses   

Can you have LASIK if you wear bifocals?

LASIK is an eye surgery that uses a laser to reshape the cornea. The cornea is the clear tissue that covers the eye and helps focus light. LASIK can treat vision problems such as nearsightedness, farsightedness and astigmatism. 

As we’ve discussed, bifocal wearers need glasses for both near and far vision correction. So is LASIK an alternative to regularly wearing bifocals? According to the American Academy of Ophthalmology, people who regularly wear bifocals can undergo a particular form of LASIK called monovision LASIK. Monovision LASIK is when one eye is treated for distance vision and the other for close-up vision. 

Another option for bifocal wearers is full distance LASIK, focusing on correcting both eyes for distance. People who choose this form of LASIK will typically continue to wear reading glasses for close-range tasks and computer work. 

LASIK may not be a solution for everyone, and speaking with your eye doctor about the procedure, results and possible complications is imperative. 

Bifocal lenses

Having progressed since Benjamin Franklin first wore them, bifocals are different from the same old lenses. Bifocals are a great option for people who are sick of switching between glasses. With the ability to wear one pair and see both near and far clearly and accurately, bifocals are an easy and economical solution.

Ask the Optician

ASK NOW

What are Bifocal Glasses?

Bifocal glasses have come a long way since the 1700s when Benjamin Franklin created the first pair. He coined them “double spectacles,” as they contained two different types of lenses in one pair of glasses. If you’re tired of constantly switching between glasses, bifocals might be the solution. And don’t worry, the lenses and style have significantly evolved since Ben Franklin’s pair. 

What are bifocals? 

Bifocals are unique multifocal lenses that allow you to have one pair of prescription glasses that can improve both near and far eyesight. If you look closely at bifocal lenses, you may notice a difference between the long-distance and close-range lenses, and that’s because they are two different prescriptions. To others looking at you, the difference is almost undetectable. This lens is designed to work as both reading and prescription glasses, all in one frame. 

How do bifocal lenses work?

The lens is divided in two, the larger part of the lens, located at the top, is for seeing long-distance. It can help you see far away, read street signs or watch television from across the room. The smaller part, located at the bottom of the lens, allows for improved close-up vision. This part enables you to check your smartphone or read a book. Bifocal lenses may take some time to adjust, but they are easy to use. You use bifocals by moving your eyes depending on the distance you wish to see. Generally, you look up and through the larger portion when looking farther away, and you look down through the smaller segment when focusing on objects nearer to your eyes. 

Bifocals are an excellent option for people with presbyopia, an age-related loss of the eyes’ ability to focus on nearby objects. Bifocals can also be worn with contact lenses, making them a versatile option for many. 

Bifocal vs progressive lenses

Both bifocal and progressive lenses allow you to transition from near to far prescriptions all in one lens. Both can also be used as a solution for presbyopia and provide comfortable vision for people with multiple prescriptions. While similar, there are a few distinct differences between the two. 

Bifocal lenses

  1. Two vision segments (one for near and one for distance vision)
  2. Has a distinct line separating the segments
  3. May cause difficulty reading a computer screen 

Progressive lenses 

  1. Progression between all distances (near, intermediate and far vision)
  2. No distinction between distance powers in the lens (no line)
  3. Middle segment for better computer vision 

While many immediately choose a progressive lens because of the seamless transition, some find the strong distinction between prescriptions in a bifocal lens more comfortable. It is important to consider your lifestyle and preference when choosing your lenses. If you’re curious or want more information, visit our Optical Centre and speak with one of our opticians. 

 

Advantages and disadvantages of bifocal lenses

As is the case with most things, bifocal lenses have advantages and disadvantages. It is important to remember that everyone has different needs when it comes to glasses. Speaking with an optician and finding the right lenses is just as important as how they look. 

Advantages

  1. One pair of glasses for near and far vision 
  2. Typically more affordable than progressive lenses 
  3. May be easier to adjust to than progressive lenses 

Disadvantages 

  1. Distinct separation lines may be distracting or “unfashionable”
  2. Visual distortion is more likely than wearing two separate pairs of glasses 
  3. They may take more time to adjust to than single vision glasses   

Can you have LASIK if you wear bifocals?

LASIK is an eye surgery that uses a laser to reshape the cornea. The cornea is the clear tissue that covers the eye and helps focus light. LASIK can treat vision problems such as nearsightedness, farsightedness and astigmatism. 

As we’ve discussed, bifocal wearers need glasses for both near and far vision correction. So is LASIK an alternative to regularly wearing bifocals? According to the American Academy of Ophthalmology, people who regularly wear bifocals can undergo a particular form of LASIK called monovision LASIK. Monovision LASIK is when one eye is treated for distance vision and the other for close-up vision. 

Another option for bifocal wearers is full distance LASIK, focusing on correcting both eyes for distance. People who choose this form of LASIK will typically continue to wear reading glasses for close-range tasks and computer work. 

LASIK may not be a solution for everyone, and speaking with your eye doctor about the procedure, results and possible complications is imperative. 

Bifocal lenses

Having progressed since Benjamin Franklin first wore them, bifocals are different from the same old lenses. Bifocals are a great option for people who are sick of switching between glasses. With the ability to wear one pair and see both near and far clearly and accurately, bifocals are an easy and economical solution.

What Is My Eye Colour?

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What Is My Eye Colour?

What determines eye colour? It’s a genetic trait, just like our hair and skin. In fact, it’s the same chemical that affects the colour of all three: melanin. The more melanin-producing cells (or melanocytes) you have, the darker your hair, skin and eyes are likely to be. But beyond that, the science of eye colour is rather complicated. Read on to learn more about where your eye colour comes from and how you can change it if you don’t like it.

 

Different eye colours

The iris is the coloured part of your eye around the pupil. Its colour is due to the amount of melanin in it. The lower the melanin, the bluer the eyes look because more wavelengths of light are reflected. The same applies to green eyes, amber eyes, hazel eyes and every shade in between. These are all caused by varying degrees of melanin. In people with albinism, there is no melanin whatsoever in the eye, and as such, they appear to have red or purple colour eyes: not because they’re reflecting red light, but because we can see the blood in the eyes. This lack of melanin also makes albino eyes highly susceptible to UV, making sunglasses necessary outdoors.

 

Blue eyes

Did you know blue eyes are not actually blue? Blue eyes do not contain any blue pigment. They appear blue for the same reason the sky does. Light entering the eye is scattered through the iris and perceived as blue because blue is the shortest wavelength of visible light; therefore, more of it is reflected back out. So technically, the eyes themselves are not blue at all.

 

Grey eyes

Grey eyes are sometimes mistaken for a greyish blue, but studies revealed hints of gold and brown in this eye colour. This type of colour may also appear slightly different depending on clothing, lighting and mood (when the dilation of the pupil compresses the iris).

 

Hazel eyes

Hazel eyes are mostly made of shades of brown and green. People with hazel eyes often have one colour closest to the pupil, a different one after that and another colour ring around the edge of the iris. Depending on the lighting, this type of eye may appear more brown than green and vice versa.

 

Green eyes

Green is the least common eye colour. This is because green eyes only occur when a specific set of genes is combined with a specific amount of melanin. This eye colour is found most frequently in Northern and Central Europe.

 

What is the most common eye colour?

Brown eyes are by far the most common worldwide, and in many areas of the world, such as East Asia and Sub-Saharan Africa, it’s rare to find any other colour. That’s because brown is a “dominant” gene, so any child of brown and non-brown-eyed parents is much more likely (though not certain) to have brown eyes too. There is no confirmed advantage of having brown eyes, but research has indicated that they may be slightly better at absorbing bright light and blocking UV rays.

 

What is the rarest eye colour?

The rarest eye colour is green. If you have this eye colour, consider yourself among the rarer population; only 2% of people worldwide have green eyes.

 

Can eyes change colour?

Even if you’re born with blue, grey or green eyes, there’s no guarantee you’ll keep them throughout your life. The melanin-producing cells in your eyes may only become active after a few months or years and, in rare cases, even longer. When this happens, brown pigment will start to be created, leading to darker eyes.


If, for whatever reason, you want to have a different eye colour, what you can do is wear coloured contacts. These are available in both prescription and plano forms. In any case, coloured contact lenses are medical devices, so you will need a valid eye prescription from a licensed optician before buying your first pair. Even if you want plano lenses, you must visit a vision specialist beforehand and have them write you a prescription specifically for wearing coloured contacts. Learn more about eye care at SmartBuyGlasses’ Optical Center.

Ask the Optician

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What Is My Eye Color?

What determines eye color? It’s a genetic trait, just like our hair and skin. In fact, it’s the same chemical that affects the color of all three: melanin. The more melanin-producing cells (or melanocytes) you have, the darker your hair, skin, and eyes are likely to be. But beyond that, the science of eye color is rather complicated. Read on to learn more about where your eye color comes from and how you can change it if you don’t like it.

Different eye colors

The iris is the colored part of your eye around the pupil. Its color is due to the amount of melanin in it. The lower the melanin, the bluer the eyes look because more wavelengths of light are reflected. The same applies to green eyes, amber eyes, hazel eyes, and every shade in between. These are all caused by varying degrees of melanin. In people with albinism, there is no melanin whatsoever in the eye, and as such, they appear to have red or purple color eyes: not because they’re reflecting red light, but because we can see the blood in the eyes. This lack of melanin also makes albino eyes highly susceptible to UV, making sunglasses necessary outdoors.

Blue eyes

Did you know blue eyes are not actually blue? Blue eyes do not contain any blue pigment. They appear blue for the same reason the sky does. Light entering the eye is scattered through the iris and perceived as blue because blue is the shortest wavelength of visible light; therefore, more of it is reflected back out. So technically, the eyes themselves are not blue at all.

Grey eyes

Gray eyes are sometimes mistaken for a greyish blue, but studies revealed hints of gold and brown in this eye color. This type of color may also appear slightly different depending on clothing, lighting, and mood (when the dilation of the pupil compresses the iris).

Hazel eyes

Hazel eyes are mostly made of shades of brown and green. People with hazel eyes often have one color closest to the pupil, a different one after that, and another color ring around the edge of the iris. Depending on the lighting, this type of eye may appear more brown than green and vice versa.

Green eyes

Green is the least common eye color. This is because green eyes only occur when a specific set of genes is combined with a specific amount of melanin. This eye color is found most frequently in Northern and Central Europe.

What is the most common eye color?

Brown eyes are by far the most common worldwide, and in many areas of the world, such as East Asia and Sub-Saharan Africa, it’s rare to find any other color. That’s because brown is a “dominant” gene, so any child of brown and non-brown-eyed parents is much more likely (though not certain) to have brown eyes too. There is no confirmed advantage of having brown eyes, but research has indicated that they may be slightly better at absorbing bright light and blocking UV rays.

What is the rarest eye color?

The rarest eye color is green. If you have this eye color, consider yourself among the rarer population; only 2% of people worldwide have green eyes.

Can eyes change color?

Even if you’re born with blue, gray, or green eyes, there’s no guarantee you’ll keep them throughout your life. The melanin-producing cells in your eyes may only become active after a few months or years and, in rare cases, even longer. When this happens, brown pigment will start to be created, leading to darker eyes.

 

If, for whatever reason, you want to have a different eye color, what you can do is wear colored contacts. These are available in both prescription and plano forms. In any case, colored contact lenses are medical devices, so you will need a valid eye prescription from a licensed optician before buying your first pair. Even if you want plano lenses, you must visit a vision specialist beforehand and have them write you a prescription specifically for wearing colored contacts. Learn more about colored contacts at SmartBuyGlasses’ Optical Center.

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Types of Glasses

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Types of Glasses

With various types of glasses, choosing the perfect pair might be overwhelming. This article helps you understand all the different types of glasses, lenses and frames available. Use this as a starting point to see all the options and find the perfect eyewear.

 

Types of prescription glasses

Firstly, you need to know if you need an eye prescription for your glasses. Whether it’s for reading, working, or leisure, many people need eyeglasses to help correct their vision and see better. Before shopping for a new pair, make sure your eye prescription is still valid, or visit your optometrist for a check-up.

 

Our eyesight naturally changes as we age, and sometimes it can change while we are still young. These changes can depend on genetics, illnesses, or a misshaped cornea. For each type of refractive error, there is a pair of prescription glasses to help correct it. 

 

Single vision glasses 

Single Vision glasses are the most common type of glasses. “Single Vision” means that the lenses only have one type of vision correction, so one focal length. They help correct refractive errors such as myopia, hyperopia and astigmatism, but only for distance or near vision, never both.

 

Bifocal glasses

Bifocal glasses have lenses with separate prescription zones for near and far vision. At the top, you’ll have your distance correction, while your near vision correction is towards the bottom. These lenses have a distinct line between each value which causes an image to jump when the eye moves from a far distance to a near one. An image jump is when the object appears to jump into view closer than it is when viewing through the near segment.

 

Progressive glasses 

Unlike bifocals, progressive glasses help correct all focal points without visible lines. Each area transitions from one visual correction to another, allowing smoother vision. The top of the lens is adapted for distance vision and gradually increases in power into the intermediate prescription, which corrects anything at an arm’s length away. Finally, it increases in power towards the bottom, designed for reading or other “close-up” tasks, like checking a price tag or using your smartphone.

 

Other types of glasses

Reading glasses

Reading glasses are a type of single vision lenses, but they do not always require a prescription and are available OTC (over the counter), even at local supermarkets. These do not correct your vision but simply magnify things to make them bigger. They also do not correct astigmatism or amblyopia (a difference of power between the two eyes), so you can only get them in the same power for both eyes (R+L). Reading glasses help you see things close up, like reading a book or looking at your phone or computer. 

The power value of reading glasses can start low (+1) and reach higher prescriptions (+4). There are different types of reading glasses which you can read more about here to choose the best one for you. In any case, we recommend consulting your opticians when experiencing visual discomfort before buying any glasses. 

 

Blue Light Glasses

Blue light blocking glasses are designed to filter out the blue light rays commonly released from digital screens. The filter on the surface of these lenses blocks out an estimated 65% of blue light rays. This will help prevent eyestrain symptoms caused by blue light that can irritate the eyes. If you use digital technology for socialising, fun, or work and have noticed changes in your eyes or health, then blue light glasses may be what your eyes need.

 

Safety Glasses

Safety glasses are available to anyone without any prescription and help protect your eyes from external factors that may hinder your vision. Safety goggles are a must if working in an environment surrounded by hazardous elements, but they can also be used in other contexts for work or leisure.

 

Sunglasses

Sunglasses are also glasses that we can use with or without a prescription to see better and protect our eyesight. Similar to prescription glasses, sunglasses can also come with various lenses and filters that work best with specific situations. If you’re looking for something practical that combines your glasses and sunglasses or don’t like wearing contact lenses, you may want to consider the following:

 

Types of lenses for glasses

Depending on a person’s eye needs and preferences, different types of lenses work best with prescription glasses. 

  • Glass
  • Plastic
  • Polycarbonate
  • Trivex & High trivex

You can also combine many lenses with protective coatings to reduce damage to your eyewear and eyesight. Alongside quality lenses, specific frames are also available for all glasses.

 

Types of glasses frames

Even frame materials and designs can impact your vision and comfort. Some are heavier than others or even bulkier, while others are more lightweight and look nearly invisible. 

 

Frame types

There are three main types of glasses frames: 

  • Full-rim: Full-rim frames completely outline the lens. They are the most durable frame type. 
  • Rimless: Rimless glasses, also known as frameless eyeglasses, are glasses with no frame. The nose bridge connects the lenses, and the temples are directly attached to the lenses. This frame type is the most delicate one.
  • Semi-rimless: Semi-rimless frames cover the top part of the lenses. 

Frame materials

There are four main types of material used for glasses frames:

  • Acetate: Acetate glasses are a low-price option, much like plastic glasses, with the benefits of greater durability and closer related to metal frames. 
  • Metal: Aside from their elegant aesthetic benefits, metal frame glasses are a durable material that isn’t likely to break easily with proper care. 
  • Plastic: Plastic is the most affordable option. Plastic frames make for a great second pair of backup glasses. Plastic is also lightweight and resistant to chemical corrosion. 
  • Titanium: While more expensive than other materials, titanium glasses are the most resistant. They are flexible, hypoallergenic and lightweight for a comfortable fit. 
  • Wood: Wood frame glasses are durable and resistant as well as eco-friendly. Aside from this, they offer a unique aesthetic quality to add to your style. 

Frame shapes 

Glasses come in a variety of shapes, and this is excellent news! You can find the one that will emphasise your best features and adapt to the type of prescription you need. Consult this infographic and then read on to learn how to match your face shape with the right frame. 

The frame size is also important when choosing the type of glasses you want. If your specs do not fit comfortably on your face, you’ll experience discomfort, such as glasses slipping down or tight frames. 



What type of glasses fits my face? 

With all these frame types, styles and shapes, there are hundreds of options to choose from. One way to start narrowing down your choices is to determine which face shape you have. Watch this tutorial to find your face shape and which glasses fit you best!

 

What type of glasses should I get?

Whether you need to read, see distant objects, or look cool, the type of glasses you need depends on your eyes and lifestyle. Firstly, if you need vision correction, make sure your prescription is up to date. Once you have that, read about the best lenses you can get or ask for online advice from one of our opticians. 

 

In this article, we’ve covered the different types of prescription and non-prescription glasses and some tips for choosing the best pair for you. We’ve also introduced the various lens materials, coatings and frames from which prescription glasses and sunglasses can benefit. 

Remember that before you buy any prescription glasses, you should have regular eye tests by your optometrist or eye doctor. At SmartBuyGlasses, you can find optical advice and trendy and quality eyewear to satisfy your needs and lifestyle. 

SHOP FOR MEN
SHOP FOR WOMEN
ASK NOW

Types of Glasses

With various types of glasses, choosing the perfect pair might be overwhelming. This article helps you understand all the different types of glasses, lenses and frames available. Use this as a starting point to see all the options and find the perfect eyewear.

 

Types of prescription glasses

Firstly, you need to know if you need an eye prescription for your glasses. Whether it’s for reading, working, or leisure, many people need eyeglasses to help correct their vision and see better. Before shopping for a new pair, make sure your eye prescription is still valid, or visit your optometrist for a check-up.

 

Our eyesight naturally changes as we age, and sometimes it can change while we are still young. These changes can depend on genetics, illnesses, or a misshaped cornea. For each type of refractive error, there is a pair of prescription glasses to help correct it. 

 

Single vision glasses 

Single Vision glasses are the most common type of glasses. “Single Vision” means that the lenses only have one type of vision correction, so one focal length. They help correct refractive errors such as myopia, hyperopia and astigmatism, but only for distance or near vision, never both.

 

Bifocal glasses

Bifocal glasses have lenses with separate prescription zones for near and far vision. At the top, you’ll have your distance correction, while your near vision correction is towards the bottom. These lenses have a distinct line between each value which causes an image to jump when the eye moves from a far distance to a near one. An image jump is when the object appears to jump into view closer than it is when viewing through the near segment.

 

Progressive glasses 

Unlike bifocals, progressive glasses help correct all focal points without visible lines. Each area transitions from one visual correction to another, allowing smoother vision. The top of the lens is adapted for distance vision and gradually increases in power into the intermediate prescription, which corrects anything at an arm’s length away. Finally, it increases in power towards the bottom, designed for reading or other “close-up” tasks, like checking a price tag or using your smartphone.

 

Other types of glasses

Reading glasses

Reading glasses are a type of single vision lenses, but they do not always require a prescription and are available OTC (over the counter), even at local supermarkets. These do not correct your vision but simply magnify things to make them bigger. They also do not correct astigmatism or amblyopia (a difference of power between the two eyes), so you can only get them in the same power for both eyes (R+L). Reading glasses help you see things close up, like reading a book or looking at your phone or computer. 

The power value of reading glasses can start low (+1) and reach higher prescriptions (+4). There are different types of reading glasses which you can read more about here to choose the best one for you. In any case, we recommend consulting your opticians when experiencing visual discomfort before buying any glasses. 

 

Blue Light Glasses

Blue light blocking glasses are designed to filter out the blue light rays commonly released from digital screens. The filter on the surface of these lenses blocks out an estimated 65% of blue light rays. This will help prevent eyestrain symptoms caused by blue light that can irritate the eyes. If you use digital technology for socialising, fun, or work and have noticed changes in your eyes or health, then blue light glasses may be what your eyes need.

 

Safety Glasses

Safety glasses are available to anyone without any prescription and help protect your eyes from external factors that may hinder your vision. Safety goggles are a must if working in an environment surrounded by hazardous elements, but they can also be used in other contexts for work or leisure.

 

Sunglasses

Sunglasses are also glasses that we can use with or without a prescription to see better and protect our eyesight. Similar to prescription glasses, sunglasses can also come with various lenses and filters that work best with specific situations. If you’re looking for something practical that combines your glasses and sunglasses or don’t like wearing contact lenses, you may want to consider the following:

 

Types of lenses for glasses

Depending on a person’s eye needs and preferences, different types of lenses work best with prescription glasses. 

  • Glass
  • Plastic
  • Polycarbonate
  • Trivex & High trivex

You can also combine many lenses with protective coatings to reduce damage to your eyewear and eyesight. Alongside quality lenses, specific frames are also available for all glasses.

 

Types of glasses frames

Even frame materials and designs can impact your vision and comfort. Some are heavier than others or even bulkier, while others are more lightweight and look nearly invisible. 

 

Frame types

There are three main types of glasses frames: 

  • Full-rim: Full-rim frames completely outline the lens. They are the most durable frame type. 
  • Rimless: Rimless glasses, also known as frameless eyeglasses, are glasses with no frame. The nose bridge connects the lenses, and the temples are directly attached to the lenses. This frame type is the most delicate one.
  • Semi-rimless: Semi-rimless frames cover the top part of the lenses. 

Frame materials

There are four main types of material used for glasses frames:

  • Acetate: Acetate glasses are a low-price option, much like plastic glasses, with the benefits of greater durability and closer related to metal frames. 
  • Metal: Aside from their elegant aesthetic benefits, metal frame glasses are a durable material that isn’t likely to break easily with proper care. 
  • Plastic: Plastic is the most affordable option. Plastic frames make for a great second pair of backup glasses. Plastic is also lightweight and resistant to chemical corrosion. 
  • Titanium: While more expensive than other materials, titanium glasses are the most resistant. They are flexible, hypoallergenic and lightweight for a comfortable fit. 
  • Wood: Wood frame glasses are durable and resistant as well as eco-friendly. Aside from this, they offer a unique aesthetic quality to add to your style. 

Frame shapes 

Glasses come in a variety of shapes, and this is excellent news! You can find the one that will emphasise your best features and adapt to the type of prescription you need. Consult this infographic and then read on to learn how to match your face shape with the right frame. 

The frame size is also important when choosing the type of glasses you want. If your specs do not fit comfortably on your face, you’ll experience discomfort, such as glasses slipping down or tight frames. 



What type of glasses fits my face? 

With all these frame types, styles and shapes, there are hundreds of options to choose from. One way to start narrowing down your choices is to determine which face shape you have. Watch this tutorial to find your face shape and which glasses fit you best!

 

What type of glasses should I get?

Whether you need to read, see distant objects, or look cool, the type of glasses you need depends on your eyes and lifestyle. Firstly, if you need vision correction, make sure your prescription is up to date. Once you have that, read about the best lenses you can get or ask for online advice from one of our opticians. 

 

In this article, we’ve covered the different types of prescription and non-prescription glasses and some tips for choosing the best pair for you. We’ve also introduced the various lens materials, coatings and frames from which prescription glasses and sunglasses can benefit. 

Remember that before you buy any prescription glasses, you should have regular eye tests by your optometrist or eye doctor. At SmartBuyGlasses, you can find optical advice and trendy and quality eyewear to satisfy your needs and lifestyle. 

SHOP FOR MEN
SHOP FOR WOMEN

Ask the Optician

ASK NOW

Cataracts

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Cataracts

What are Cataracts?

A cataract is defined as the clouding of the eye’s natural lens, which is located behind the iris and the pupil. Cataracts are a natural eye condition and are the most common cause of vision loss in people aged over 40. In fact, cataracts are the leading cause of blindness worldwide. Thankfully, they can be easily treated with corrective lenses or cataract surgery.

Types of cataracts include:
1) Subcapsular cataracts: Occur at the back of the lens

2) Nuclear cataracts: Form deep in the center of the lens

3) Cortical cataracts: Begin to form on the periphery of the lens and work their way to cloud the center

 

Cataract symptoms

Cataracts start out small and at first have little effect on your eyesight. However, if they go untreated they can obstruct your eye’s vision all together. 

Vision affected by a cataract will at first appear hazy and a little blurred. A cataract may also cause light from the sun or lamps seem brighter and more distracting than normal. In addition, colors may not seem as bright as they did before. 

Your exact symptoms will depend on what type of cataract you have. In fact, when a nuclear cataract begins to develop, it can actually cause a temporary increase in your near vision known as “second sight”. In time, this improved vision will disappear as the cataract worsens. As for a subcapsular cataract, you may not experience symptoms until the condition is far along.  

If you think you are experiencing cataract symptoms, be sure to visit a licensed eye care specialist for a professional diagnosis.

 

What Causes Cataracts?

The natural lenses inside our eyes are made up of water and protein. The compound is perfectly balanced so that light can be absorbed and retracted just right, and so that the retina can transmit a crystal clear message to the brain.  But as we age, some of the protein may begin to clump together and cloud a small area of the lens. This will affect the light that is absorbed by the retina and blur the image that is transmitted to the brain. Protein clumping in the eyes is a natural aging process but certain factors may increase your chances of developing cataracts. These include:

– UV radiation
– Diabetes
– Hypertension
– Obesity
– Smoking
– Previous eye injury or inflammation
– Previous eye surgery
– Hormone Replacement Therapy (HRT)
– Heavy alcohol consumption
– High myopia
– Genetics

Certain studies have concluded that cataracts may be linked to oxidative changes in the eye’s lenses. A recommended way to counter these changes is to increase your consumption of fruits and vegetables that are high in antioxidants, particularly leafy greens. Other studies have found that foods high in fiber, vitamin E, vitamin C and omega-3 fatty acids may also reduce your risk for cataracts. 

 

Cataract Treatment

If you have been diagnosed with cataracts by a licensed professional, the easiest and quickest option for improving your vision will be getting a new pair of glasses, strong bifocals, using magnification or by simply adjusting your surrounding lighting accordingly. 

However, if your conditions progress and begin to affect your daily life, you may need to consider cataract surgery to alleviate your vision problems. 

 

Cataract Surgery

Cataract surgery is very successful in restoring lost vision. It’s a simple and relatively painless procedure and nine out of ten people who have cataract surgery regain very good vision after the procedure and achieve somewhere between 20/20 and 20/40 vision. If you have cataracts in both eyes that require surgery, you will need to have the surgery performed twice – at separate times for each eye. Usually the time interval between surgeries is four to eight weeks. 

There are two common types of cataract surgery:

1) Phacoemulsification (Phaco) surgery where a small incision is made on the cornea and a tiny probe is placed into the eye. The device emits ultrasound waves that break up the clouded lens so that it can be removed by suction. This is the most common method of cataract removal surgery today. 

2) Extracapsular surgery involves making a long incision on the side of the cornea and removing the clouded core of the lens all at once. The rest of the lens is removed by suction.

After the clouded lenses have been moved, they are replaced with a clear, plastic intraocular lens (IOL). New IOLs are being constantly researched and developed to make the surgery less complicated for surgeons and to create better, more efficient lenses for patients. 

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Cataracts

What are Cataracts?

A cataract is defined as the clouding of the eye’s natural lens, which is located behind the iris and the pupil. Cataracts are a natural eye condition and are the most common cause of vision loss in people aged over 40. In fact, cataracts are the leading cause of blindness worldwide. Thankfully, they can be easily treated with corrective lenses or cataract surgery.

Types of cataracts include:
1) Subcapsular cataracts: Occur at the back of the lens

2) Nuclear cataracts: Form deep in the center of the lens

3) Cortical cataracts: Begin to form on the periphery of the lens and work their way to cloud the center

Cataract symptoms

Cataracts start out small and at first have little effect on your eyesight. However, if they go untreated they can obstruct your eye’s vision all together. 

Vision affected by a cataract will at first appear hazy and a little blurred. A cataract may also cause light from the sun or lamps seem brighter and more distracting than normal. In addition, colors may not seem as bright as they did before. 

Your exact symptoms will depend on what type of cataract you have. In fact, when a nuclear cataract begins to develop, it can actually cause a temporary increase in your near vision known as “second sight”. In time, this improved vision will disappear as the cataract worsens. As for a subcapsular cataract, you may not experience symptoms until the condition is far along.  

If you think you are experiencing cataract symptoms, be sure to visit a licensed eye care specialist for a professional diagnosis.

What Causes Cataracts?

The natural lenses inside our eyes are made up of water and protein. The compound is perfectly balanced so that light can be absorbed and retracted just right, and so that the retina can transmit a crystal clear message to the brain.  But as we age, some of the protein may begin to clump together and cloud a small area of the lens. This will affect the light that is absorbed by the retina and blur the image that is transmitted to the brain. Protein clumping in the eyes is a natural aging process but certain factors may increase your chances of developing cataracts. These include:

– UV radiation
– Diabetes
– Hypertension
– Obesity
– Smoking
– Previous eye injury or inflammation
– Previous eye surgery
– Hormone Replacement Therapy (HRT)
– Heavy alcohol consumption
– High myopia
– Genetics

Certain studies have concluded that cataracts may be linked to oxidative changes in the eye’s lenses. A recommended way to counter these changes is to increase your consumption of fruits and vegetables that are high in antioxidants, particularly leafy greens. Other studies have found that foods high in fiber, vitamin E, vitamin C and omega-3 fatty acids may also reduce your risk for cataracts. 

Cataract Treatment

If you have been diagnosed with cataracts by a licensed professional, the easiest and quickest option for improving your vision will be getting a new pair of glasses, strong bifocals, using magnification or by simply adjusting your surrounding lighting accordingly. 

However, if your conditions progress and begin to affect your daily life, you may need to consider cataract surgery to alleviate your vision problems. 

Cataract Surgery

Cataract surgery is very successful in restoring lost vision. It’s a simple and relatively painless procedure and nine out of ten people who have cataract surgery regain very good vision after the procedure and achieve somewhere between 20/20 and 20/40 vision. If you have cataracts in both eyes that require surgery, you will need to have the surgery performed twice – at separate times for each eye. Usually the time interval between surgeries is four to eight weeks. 

There are two common types of cataract surgery:

1) Phacoemulsification (Phaco) surgery where a small incision is made on the cornea and a tiny probe is placed into the eye. The device emits ultrasound waves that break up the clouded lens so that it can be removed by suction. This is the most common method of cataract removal surgery today. 

2) Extracapsular surgery involves making a long incision on the side of the cornea and removing the clouded core of the lens all at once. The rest of the lens is removed by suction.

After the clouded lenses have been moved, they are replaced with a clear, plastic intraocular lens (IOL). New IOLs are being constantly researched and developed to make the surgery less complicated for surgeons and to create better, more efficient lenses for patients. 

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How can I get a copy of my prescription?

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How to Get a Glasses Prescription

Where | How long does it take? | Online prescriptions | Accuracy | Prescription History | How to read | How to shop

By Anna MacGabhann
Reviewed by Sharlene McKeeman
Sharlene McKeeman

Reviewed by

Sharlene McKeeman
Sharlene is a qualified dispensing optician with over 7 years optical experience, a member of the Association of British Dispensing Opticians and registered with the General Optical Council.
Updated On Mar 29, 2023

Read our useful guide on the different ways to get your glasses prescription!

Technology in the eye industry is constantly evolving. Today, it is easier and more efficient than ever to get a copy of your eye prescription. Gone are the days of waiting in long lines to receive your prescription from the optician’s office. Read on to learn more about eye prescriptions, where to get them and how to read them.

Where can I get a copy of my eye prescription?

Your eye prescription (also known as Rx prescription) is written by an eyewear prescriber, such as an optician or optometrist. It specifies the value of parameters needed to construct and dispense corrective lenses for a patient.

It is recommended that you get an eye test from your doctor at least every two years to check the health of your eyes and if your eyesight has changed. Before buying a new pair of glasses, it is vital that your prescription is up to date. If you have not had an eye test in recent years, consider booking an eye test with an optician before trying to obtain your current prescription.

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How long does it take to get prescription glasses?

Standard in-person eye tests usually take around 30 minutes. Once your eye test is complete, your doctor will provide you with your prescription card. If you ever misplace your card, you can call up your doctor and request a copy of your prescription.

However, there is an even quicker way to find out your eye prescription. If you simply need a retrieval of your current eye prescription from your current glasses, you can use our revolutionary technology to reveal it without leaving the house! 

At SmartBuyGlasses, you can extract your current prescription in a matter of minutes from your glasses with the innovative vision testing Lens Scanner App. By scanning your current prescription glasses, you’ll have access to your current prescription in minutes, completely free of charge. This is perfect for individuals who are happy with their current prescription but would like to update their eyewear.

    

Can I get a copy of my eye prescription online?

Depending on the practice you attend, some opticians may be able to provide you with your eye prescription online. Following your eye test, your prescription will be registered at the optical practice where you had the eye exam. It is a legal requirement to provide you with your prescription for glasses or contact lenses upon request. 

Both opticians and the customer benefit from being able to access prescriptions online due to convenience and time. Usually, you can visit your practice’s website to request the prescription, call them, or send an email. 

Some companies may even be able to send over prescriptions on the same day. Simply search the practice and location online to find out more about the best way to contact your optician!

SUMMARY

Getting your prescription can be quick and easy! If you are in a pinch and have your correct prescription glasses at hand, you can use our handy LensScanner tool to get your prescription details. 

How accurate are online prescription glasses?

There will be no changes made to the prescription you obtained from your optometrist, even if they publish it online, so it is 100% accurate. 

As for our Lens Scanner App, when used correctly, it can accurately reveal the power in your lenses in a matter of moments. Please be aware that using the Lens Scanner App cannot be used for progressive lenses and is not a substitution for an eye exam. We recommend getting an eye exam if you have noticed changes in your eyesight and to check your eye health.

Can I see my prescription history?

It may be beneficial for you to look into your eye prescription history to see the changes in your eyesight over the years. You can request your eye prescription history from your optician via phone call, email, or by visiting the branch. 

Some opticians allow you to access your prescription history online via their website, so it’s worth checking this out first! Please note that requesting your prescription history can take longer than requesting your current prescription, as there are more details to prepare.

How to read lens prescriptions

To understand how to read your prescription, you can check out our guide to reading prescriptions or continue reading for a brief overview.

  • Generally, a prescription will include the following information: sphere power, cylinder power, axis and ADD power.
  • Sphere power indicates how strong your prescription lenses should be to correct any near or Farsightedness. This number can range from negative numbers (for Nearsightedness) to positive numbers (for Farsightedness). The greater the number, the stronger the prescription needed to correct vision problems.
  • Cylinder power indicates if astigmatism is present and the amount of correction required by referencing a minus or plus sign and a numerical value. If this field is left blank on your prescription, it means no astigmatism is present.
  • Axis indicates the angle of your prescription lenses, expressed in degrees on a scale from 0-180. This number will usually have a small “x” placed before it to indicate that it is an axis measurement.
  • Finally, ADD power indicates how much prescription strength you need for reading and other tasks requiring near vision. This field is typically filled out if you are over the age of 40, as people typically start to need prescription lenses for seeing up close around this age.

By understanding these key elements of an eye prescription, you can discover more about your own optical health and decide which glasses are perfect for you!

How to shop for glasses online

Now you’re all set! You know how to get a copy of your prescription directly from your optician online or in person and you have more insight into how to read it. Don’t forget to check out the Lens Scanner App to retrieve your current prescription in five minutes or less. 

In addition, you can also discover your pupillary distance (PD) with our useful online tool. Once you have your up-to-date prescription and PD, you’re ready to start shopping for a new pair of prescription  glasses from our range at SmartBuyGlasses. If you have further questions regarding your prescription, contact our in-house opticians or learn more about eye prescriptions at the Optical Centre section of our website.

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How to Get a Glasses Prescription

Key Points | How to loosen | How to tighten | Tilted frames | Professional help

By Anna MacGabhann
Reviewed by Sharlene McKeeman
Sharlene McKeeman

Reviewed by

Sharlene McKeeman
Sharlene is a qualified dispensing optician with over 7 years optical experience, a member of the Association of British Dispensing Opticians and registered with the General Optical Council.
Updated On Mar 29, 2023

Read our useful guide on the different ways to get your glasses prescription!

Technology in the eye industry is constantly evolving. Today, it is easier and more efficient than ever to get a copy of your eye prescription. Gone are the days of waiting in long lines to receive your prescription from the optician’s office. Read on to learn more about eye prescriptions, where to get them, and how to read them.

Where can I get a copy of my eye prescription?

Your eye prescription (also known as Rx prescription) is written by an eyewear prescriber, such as an optician or optometrist. It specifies the value of parameters needed to construct and dispense corrective lenses for a patient.

It is recommended that you get an eye test from your doctor at least every two years to check the health of your eyes and if your eyesight has changed. Before buying a new pair of glasses, it is vital that your prescription is up to date. If you have not had an eye test in recent years, consider booking an eye test with an optician before trying to obtain your current prescription.

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How long does it take to get prescription glasses?

Standard in-person eye tests usually take around 30 minutes. Once your eye test is complete, your doctor will provide you with your prescription card. If you ever misplace your card, you can call up your doctor and request a copy of your prescription.

However, there is an even quicker way to find out your eye prescription. If you simply need a retrieval of your current eye prescription from your current glasses, you can use our revolutionary technology to reveal it without leaving the house! 

At SmartBuyGlasses, you can extract your current prescription in a matter of minutes from your glasses with the innovative vision testing Lens Scanner App. By scanning your current prescription glasses, you’ll have access to your current prescription in minutes, completely free of charge. This is perfect for individuals who are happy with their current prescription but would like to update their eyewear.

Can I get a copy of my eye prescription online?

Depending on the practice you attend, some opticians may be able to provide you with your eye prescription online. Following your eye test, your prescription will be registered at the optical practice where you had the eye exam. It is a legal requirement to provide you with your prescription for glasses or contact lenses upon request. 

Both opticians and the customer benefit from being able to access prescriptions online due to convenience and time. Usually, you can visit your practice’s website to request the prescription, call them, or send an email. 

Some companies may even be able to send over prescriptions on the same day. Simply search the practice and location online to find out more about the best way to contact your optician!

SUMMARY
Getting your prescription can be quick and easy! If you are in a pinch and have your correct prescription glasses at hand, you can use our handy LensScanner tool to get your prescription details.

How accurate are online prescription glasses?

There will be no changes made to the prescription you obtained from your optometrist, even if they publish it online, so it is 100% accurate. 

As for our Lens Scanner App, when used correctly, it can accurately reveal the power in your lenses in a matter of moments. Please be aware that using the Lens Scanner App cannot be used for progressive lenses and is not a substitution for an eye exam. We recommend getting an eye exam if you have noticed changes in your eyesight and to check your eye health.

Can I see my prescription history?

It may be beneficial for you to look into your eye prescription history to see the changes in your eyesight over the years. You can request your eye prescription history from your optician via phone call, email, or by visiting the branch. 

Some opticians allow you to access your prescription history online via their website, so it’s worth checking this out first! Please note that requesting your prescription history can take longer than requesting your current prescription, as there are more details to prepare.

How to read lens prescriptions

To understand how to read your prescription, you can check out our guide to reading prescriptions or continue reading for a brief overview.

  • •Generally, a prescription will include the following information: sphere power, cylinder power, axis, and ADD power.
  •  
  • •Sphere power indicates how strong your prescription lenses should be to correct any near or Farsightedness. This number can range from negative numbers (for Nearsightedness) to positive numbers (for Farsightedness). The greater the number, the stronger the prescription needed to correct vision problems.
  •  
  • •Cylinder power indicates if astigmatism is present and the amount of correction required by referencing a minus or plus sign and a numerical value. If this field is left blank on your prescription, it means no astigmatism is present.
  •  
  • •Axis indicates the angle of your prescription lenses, expressed in degrees on a scale from 0-180. This number will usually have a small “x” placed before it to indicate that it is an axis measurement.
  •  
  • •Finally, ADD power indicates how much prescription strength you need for reading and other tasks requiring near vision. This field is typically filled out if you are over the age of 40, as people typically start to need prescription lenses for seeing up close around this age.
  •  

By understanding these key elements of an eye prescription, you can discover more about your own optical health and decide which glasses are perfect for you!

How to shop for glasses online

Now you’re all set! You know how to get a copy of your prescription directly from your optician online or in person, and you have more insight into how to read it. Don’t forget to check out the Lens Scanner App to retrieve your current prescription in five minutes or less. 

In addition, you can also discover your pupillary distance (PD) with our useful online tool. Once you have your up-to-date prescription and PD, you’re ready to start shopping for a new pair of prescription  glasses from our range at SmartBuyGlasses. If you have further questions regarding your prescription, contact our in-house opticians or learn more about eye prescriptions at the Optical Centre section of our website.

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Tinted Sunglasses – What Are They Good For?

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Tinted Sunglasses - What Are They Good For?

For those with a more specific use in mind for their eyewear, it is worth checking the options of tinted sunglasses. Besides the fact that there are multiple types of eyeglass tinting to opt for, they all have unique benefits that they bring with various suggested uses. People who see the world through rose-coloured glasses will agree that you can find functional sunglasses combined with style too! Sunglasses with coloured lenses are trendy and offer a unique look that will catch the eye! Interested? Read the rest of the article to understand what tinted eyeglass lenses can work for you.


What colour tint is best for sunglasses?

Deciding what colour tint is best for sunglasses can change from person to person. It depends on your lifestyle and what you will do while wearing your sunglasses. Let’s run through the options.

Green tinted sunglasses

Green lenses like these from Oakley filter out your view’s blue light and provide contrast and sharpness that reduces eye strain and glare in bright environments. These tinted lenses are great for:

• Rainy or sunny weather conditions

• Golf

• Outdoor activities

 

Blue/Purple tinted sunglasses

Eyeglass tinting that uses blue/purple lenses like this pair of Ray-Ban frames enhances colour perception and improves object contours. The features of these sunglasses with coloured lenses are ideal for:

• Eliminating sun glare

• Misty, foggy, and snowy weather conditions

• Hockey

• Cricket

 

Red/Pink tinted sunglasses

As seen on this pair from Arise Collective, red or pink lenses soothe the eyes as they block blue light and minimise eye strain and glare from screens. They can also aid with depth perception. When are they suitable to wear?

• Driving / Racing

• Skiing and other winter sports

 

Dark amber, copper, or brown tinted sunglasses

Dark amber, copper, or brown lenses enhance the colour red and, therefore, can illuminate brake lights when driving. Not only that, but they also help with judging distance in hazy and foggy conditions. The activities that pair well with frames like the one above from SmartBuy Collection include:

• Driving

• Fishing

• High altitude sports

 

Grey/Black tinted sunglasses

 

Grey and black lenses are a fantastic option for general use and work on bright and overcast days. This option of coloured lenses, like the Carrera pair above, provides accurate colour perception while offering the most significant light reduction. You should grab a pair if you are into the following:

• Water sports

• Deep-sea fishing

• Outdoor leisure

• Baseball

 

Yellow tinted sunglasses

By filtering out blue light, yellow lenses like this Polaroid pair help the eyes pick out soft colours, which is beneficial in low-light settings such as indoor sports and overcast days. Ideal activities for this colour of tinted sunglasses are:

• Hiking in shaded areas

• Mountain biking

• Indoor shooting

• Tennis

 

Why is sunglasses tinting important?

 The importance of eyeglass tinting becomes evident after using the correct lenses for your activities. Tinted lenses provide helpful adjustments that help you go through your day with ease. For example, they equip wearers with the best alteration to stay safe when enjoying their favourite pastimes and sports. 

If you’re looking for more options, polarised sunglasses are fantastic for enhancing your outdoor experience. They eliminate frustrating glare by filtering the light that passes through your lens.

Now that you know what coloured lens sunglasses can have a use in your life, browse through our collection of tinted eyeglass lenses and pick out your match! As you can see, we have a selection of lens types for any activity and style Which colour will you choose?

Ask the Optician

ASK NOW

Tinted Sunglasses - What Are They Good For?

For those with a more specific use in mind for their eyewear, it is worth checking the options of tinted sunglasses. Besides the fact that there are multiple types of eyeglass tinting to opt for, they all have unique benefits that they bring with various suggested uses. People who see the world through rose-coloured glasses will agree that you can find functional sunglasses combined with style too! Sunglasses with coloured lenses are trendy and offer a unique look that will catch the eye! Interested? Read the rest of the article to understand what tinted eyeglass lenses can work for you.

What colour tint is best for sunglasses?

Deciding what colour tint is best for sunglasses can change from person to person. It depends on your lifestyle and what you will do while wearing your sunglasses. Let’s run through the options.

Green tinted sunglasses

Green lenses like these from Oakley filter out your view’s blue light and provide contrast and sharpness that reduces eye strain and glare in bright environments. These tinted lenses are great for:

• Rainy or sunny weather conditions

• Golf

• Outdoor activities

 

Blue/Purple tinted sunglasses

Eyeglass tinting that uses blue/purple lenses like this pair of Ray-Ban frames enhances colour perception and improves object contours. The features of these sunglasses with coloured lenses are ideal for:

• Eliminating sun glare

• Misty, foggy, and snowy weather conditions

• Hockey

• Cricket

 

Red/Pink tinted sunglasses

As seen on this pair from Arise Collective, red or pink lenses soothe the eyes as they block blue light and minimise eye strain and glare from screens. They can also aid with depth perception. When are they suitable to wear?

• Driving / Racing

• Skiing and other winter sports

 

Dark amber, copper, or brown tinted sunglasses

Dark amber, copper, or brown lenses enhance the colour red and, therefore, can illuminate brake lights when driving. Not only that, but they also help with judging distance in hazy and foggy conditions. The activities that pair well with frames like the one above from SmartBuy Collection include:

• Driving

• Fishing

• High altitude sports

 

Grey/Black tinted sunglasses

 

Grey and black lenses are a fantastic option for general use and work on bright and overcast days. This option of coloured lenses, like the Carrera pair above, provides accurate colour perception while offering the most significant light reduction. You should grab a pair if you are into the following:

• Water sports

• Deep-sea fishing

• Outdoor leisure

• Baseball

 

Yellow tinted sunglasses

By filtering out blue light, yellow lenses like this Polaroid pair help the eyes pick out soft colours, which is beneficial in low-light settings such as indoor sports and overcast days. Ideal activities for this colour of tinted sunglasses are:

• Hiking in shaded areas

• Mountain biking

• Indoor shooting

• Tennis

 

Why is sunglasses tinting important?

 The importance of eyeglass tinting becomes evident after using the correct lenses for your activities. Tinted lenses provide helpful adjustments that help you go through your day with ease. For example, they equip wearers with the best alteration to stay safe when enjoying their favourite pastimes and sports. 

If you’re looking for more options, polarised sunglasses are fantastic for enhancing your outdoor experience. They eliminate frustrating glare by filtering the light that passes through your lens.

Now that you know what coloured lens sunglasses can have a use in your life, browse through our collection of tinted eyeglass lenses and pick out your match! As you can see, we have a selection of lens types for any activity and style Which colour will you choose?

What does Asian Fit mean?

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What Are Asian Fit Glasses?

Asian fit glasses | Solutions | Facial Features | Can Non-Asians wear this fit? | Asian fit vs Standard Fit | Size | Nose Pads | Frames | Do I need Asian fit?

By Anna MacGabhann
Reviewed by Beck Jinnette
Beck Jinnette

Reviewed by

Beck Jinnette
Beck has over 17 years of experience in eye care, holding her Certificate IV in Dispensing in Australia.
Updated On Mar 28, 2023
Depending on your facial features, Asian fit glasses may be the best for you. They have special features that give you the most comfortable fit and stops the frames from sliding down your nose.

If you are having problems with your glasses fitting your face comfortably, then this article all about Asian fit has the answers you are looking for. 

Do you find that your glasses sit tightly, always slide down your nose or sit too close to your eyelashes? Then maybe your face is telling you to upgrade to a pair that fits your facial features the way they are supposed to.

What does Asian fit mean in glasses?

We all look different and we all have different facial features. Just think about how, nowadays, anyone can unlock their phone by simply placing it in front of their face.

When choosing a pair of glasses, remember that what fits your face won’t necessarily fit another – just like your face is the only one to unlock your phone. It could be your eye shape, bone structure and so on. 

Do you feel that your glasses do not correctly fit your face because they are too tight at the temples or always slip down your nose? For people with lower nose bridges and high cheekbones in particular this is a common issue. Due to the diversity among facial features, standard glasses aren’t always the right fit.

We have a solution!

Asian fit glasses are designed specifically to help avoid these issues. Also known as low bridge fit glasses or Omni fit, Asian fit eyewear can be more comfortable for people of Asian descent but is also not limited to them.

Asian fit sunglasses and glasses cater to specific facial features. If your answer is yes to any of these questions below, then you may want to consider getting yourself a pair of low bridge fit glasses:

  • Do you have flatter facial features?
  • A rounder and wider face?
  • A low nose bridge and/or higher cheekbones?

If you’ve said yes to 1 or more of the above questions, then sit back and let’s have a look at what your face is saying.

Humans have adapted to their environment and climate for centuries, and based on these factors, our bodies have mutated to fit our surroundings, even our facial features.

Our noses, for example, have adapted to diverse climates, and if you live in a more humid climate, you’ll tend to have a wider nose to allow for more air to flow.

Facial features

In the Asian community, many tend to have a lower nasal bridge, the part that is between your eyes and close to your forehead. Therefore the bridge of your nose is lower than your pupils, making it harder for the glasses to sit correctly on your face and align with your vision. 

If you have higher cheekbones, your glasses will tend to touch your cheeks, so when you talk or smile, you’ll see your glasses move as well. If your eyewear is always leaning on your cheeks, it can be uncomfortable.

With a wider and rounder face, standard glasses can be a little tighter around the temples or quite often sit too high on your face.

Can non-Asians wear Asian fit glasses?

Whether you are from an Asian community or not, having these particular facial features may entail that Asian fit glasses are designed specifically for you. If you have a smaller face shape you may also opt for an Asian fit.

What is the difference between Asian fit and standard fit?

Now that we’ve established who and for which particular facial features Asian fit glasses are, we can see exactly how they work. 

3 main aspects make Asian fit glasses a little different from Standard fit glasses:

  • Asian-fit glasses are designed with larger nose pads that ensure the glasses sit correctly on your face and away from your eyelashes. Standard fit glasses, instead, have a shorter bridge meaning that they may not fit well if you have a low nose bridge. 
  • The lenses are shorter, wider, and slightly tilted. This helps prevent the glasses from constantly touching your cheek and helps to create a gap between your face and the lenses. With your glasses sitting further away from your face, you’ll also reduce the risk of your eyewear fogging up, a pain every glasses wearer endures.  
  • The frame is wider and slightly curved for rounder and prominent heart face shapes, to prevent the glasses from being too tight at the temples or sitting too high on your face. 

 Round and heart-shaped faces tend to have a wider forehead which means that some regular or smaller size glasses would be too tight and squeeze your face. If you are not entirely sure what your face shape is, you can easily find out with our shape face guide.

Are Asian fit glasses smaller?

Just like any clothing item that we wear, even glasses have a particular size, whether they are standard fit or Asian fit. They are smaller in some aspects, but it will depend on the measurement.

Sunglasses, and glasses in general, have 3 different measurements:

  1. The first measurement indicates your lens width
  2. The second number is the width of the bridge
  3. The third is the temple width

Extra nose pad features

For Onmi fit glasses, you want to ensure that the bridge or nose pads have the right size to sit correctly on your nose. The size can also differ depending on the frame material used.

Generally, bridge measurements on standard-fit glasses vary from 14-24 mm, but if it is too wide on your nose bridge, the glasses may slip down.

DID YOU KNOW?
There are many differences between Asian and Standard fit glasses. Finding out if you need Asian fit can make your experience much more comfortable.

Frame type

Plastic frames with a solid nose bridge for Asian fit glasses can measure around 8mm and this helps provide support and less slipping. A great example is Ray-Ban Asian fit glasses, which sit just right on your face and avoid any touching between your cheeks and glasses. 

Many metal frames, for example, have adjustable nose pads that you can adjust to fit the glasses properly on each side of your nose. Certain metal frames can have a nose bridge of up to 11mm. Measurements for low bridge glasses can tend to be lower than the standard fit but do vary. But don’t let all these numbers stop you from getting a pair of trendy and cool Asian fit glasses.

Great-looking, better-fitting glasses

If you have a low nose bridge, wide and flat facial features or high cheekbones, then most probably Asian fit glasses are just the right eyewear for you. 

Look trendy with a pair of  Asian fit eyeglasses  or low bridge sunglasses that fit; avoid the pain of your eyewear moving inconveniently or them fogging up your vision because they are too close to your face.

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How do I measure my pupillary distance

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What is Pupillary Distance?

Why PD is important | Measuring PD yourself | Measuring PD online | Measuring PD at home | Standard PD | Monocular and Binocular PD | Accuracy

By Anna MacGabhann
Reviewed by Beck Jinnette
Beck Jinnette

Reviewed by

Beck Jinnette
Beck has over 17 years of experience in eye care, holding her Certificate IV in Dispensing in Australia.
Updated On Mar 28, 2023

Pupillary distance is the distance between your pupils. Read our guide on what it is, and how to find it.

If you’re planning on placing your first order of prescription glasses online, it may initially seem a little intimidating. Coming across terms like pupillary distance (PD) and not knowing what it is can be frustrating. That is why we’ve put together an easy guide to everything you need to know about reading your pupillary distance.

Pupillary distance is the distance between your pupils and is crucial knowledge when fitting your prescription eyewear. To have the clearest vision, the distance between the centre of the left lens and the right lens should be the same as the distance between your pupils.

Why pupillary distance is important

Pupillary distance (PD) is an important step in getting glasses as it helps lens makers determine the centre of your lenses. The monocular PD measures each eye separately and lets the eyeglass maker see exactly how much space there should be between your eyes for optimum viewing performance. When you measure your pupillary distance, you provide eyeglass makers with essential information needed to make sure your vision correction will be perfect for you.

It can take only a few seconds to write down or snap a photo of your PD, but if you don’t get this correct during an eye exam, it could mean the difference between clear vision and a distorted lens. That’s why measuring the pupillary distance carefully is key to getting the best vision possible out of your new pair of glasses or contact lenses.

Can you measure pupillary distance yourself?

The pupillary distance can be found at the bottom of your prescription card, as your eye doctor or specialist usually measures it. However, it could be the case that there is no pupillary distance in your prescription because your doctor did not include it or you didn’t realize you had to ask for it. In that case, you can easily retrieve the measurements using an online tool or do it yourself with the help of a mirror and a ruler.

SHOP FOR MEN
SHOP FOR WOMEN

Find your pupillary distance online

Our free pupillary distance app is the best option for getting pupillary distance online. We recommend this option as it’s fast, easy and accurate. All you need for our online tool is a smartphone, a webcam and a magnetic strip card. The app has voice instructions that will guide you through each step of PD measurement. Head to our website and see how easy it is

SUMMARY

Pupillary distance is an important measurement to know when fitting glasses. You can easily find it yourself at home or online without going to a professional.

How to measure your PD at home

If you don’t have access to the tools required to use our app, you can easily measure your PD by yourself. All you need is a ruler and a mirror on standby.

  1. Standing in front of a mirror, hold the ruler up to the bridge of your nose or against the line of your eyebrows.
  2. Close your right eye. While looking in the mirror, align the ruler’s zero with your left pupil.
  3. Keeping the ruler still, close your left eye and open your right eye.
  4. Read the number aligned with your right pupil’s centre. This number is your first pupillary distance measurement.
  5. Repeat the process to ensure you get the most accurate measurement result.

If you are struggling to follow these steps, enlisting the help of a friend could make things easier. All you need to do is stand facing your friend and ask them to measure your PD using either a ruler or a millimeter tape measure. Both of you can repeat the steps outlined above, with your friend holding the ruler to the bridge of your nose and taking the measurement. During this, the person assisting you must make sure their own head is very straight.

 

What is a standard pupillary distance?

Pupillary distance is different for each individual. The average adult’s pupillary distance is between 54 and 74 mm, while the average pupillary distance for children is between 41 and 55 mm. Since a person’s pupillary distance changes with physical development, it is important to consider that children may have different pupillary distances each year.

What is the difference between Monocular and Binocular PDs?

Monocular PD measures only one eye – usually the dominant eye – while Binocular PD measures both eyes to obtain a more accurate PD measurement. Considering that most frame styles need both eyes’ measurements for optimal comfort and fit, Binocular-PD measurement should be preferred over Monocular-PD measurement when selecting glasses. 

Plus, as modern frames come in numerous sizes and shapes, such as cat-eye, it may not always be possible to replicate a fitting accurately with just one measurement from a frame you previously owned. Measure twice to ensure a perfect measurement!

How accurate does my pupillary distance have to be?

Pupillary distance has to be as accurate as possible to ensure you’re getting the best out of your prescription glasses. If you’re in doubt or have questions, head to our Optical Centre for more information and speak to one of our opticians online today.

Ask the Optician

ASK NOW

What is Pupillary Distance?

Why PD is important | Measuring PD yourself | Measuring PD online | Measuring PD at home | Standard PD | Monocular and Binocular PD | Accuracy

By Anna MacGabhann
Reviewed by Beck Jinette
Beck Jinette

Reviewed by

Beck Jinette
Beck has over 17 years of experience in eye care, holding her Certificate IV in Dispensing in Australia.
Updated On Mar 28, 2023

If you’re planning on placing your first order of prescription glasses online, it may initially seem a little intimidating. Coming across terms like pupillary distance (PD) and not knowing what it is can be frustrating. That is why we’ve put together an easy guide to everything you need to know about reading your pupillary distance.

Pupillary distance is the distance between your pupils and is crucial knowledge when fitting your prescription eyewear. To have the clearest vision, the distance between the centre of the left lens and the right lens should be the same as the distance between your pupils.

Why pupillary distance Is important

Pupillary distance (PD) is an important step in getting glasses as it helps lens makers determine the centre of your lenses. The monocular PD measures each eye separately and lets the eyeglass maker see exactly how much space there should be between your eyes for optimum viewing performance. When you measure your pupillary distance, you provide eyeglass makers with essential information needed to make sure your vision correction will be perfect for you.

It can take only a few seconds to write down or snap a photo of your PD, but if you don’t get this correct during an eye exam, it could mean the difference between clear vision and a distorted lens. That’s why measuring the pupillary distance carefully is key to getting the best vision possible out of your new pair of glasses or contact lenses.

Can you measure pupillary distance yourself?

The pupillary distance can be found at the bottom of your prescription card, as your eye doctor or specialist usually measures it. However, it could be the case that there is no pupillary distance in your prescription because your doctor did not include it or you didn’t realize you had to ask for it. In that case, you can easily retrieve the measurements using an online tool or do it yourself with the help of a mirror and a ruler.

SHOP FOR MEN
SHOP FOR WOMEN

Measure your pupillary distance online

Our free pupillary distance app is the best option for getting pupillary distance online. We recommend this option as it’s fast, easy and accurate. All you need for our online tool is a smartphone, a webcam and a magnetic strip card. The app has voice instructions that will guide you through each step of PD measurement. Head to our website and see how easy it is.

SUMMARY
Pupillary distance is an important measurement to know when fitting glasses. You can easily measure it yourself at home or online without going to a professional.

How to measure your PD at home

If you don’t have access to the tools required to use our app, you can easily measure your PD by yourself. All you need is a ruler and a mirror on standby.

  1. Standing in front of a mirror, hold the ruler up to the bridge of your nose or against the line of your eyebrows.
  2. Close your right eye. While looking in the mirror, align the ruler’s zero with your left pupil.
  3. Keeping the ruler still, close your left eye and open your right eye.
  4. Read the number aligned with your right pupil’s centre. This number is your first pupillary distance measurement.
  5. Repeat the process to ensure you get the most accurate measurement result.

If you are struggling to follow these steps, enlisting the help of a friend could make things easier. All you need to do is stand facing your friend and ask them to measure your PD using either a ruler or a millimeter tape measure. Both of you can repeat the steps outlined above, with your friend holding the ruler to the bridge of your nose and taking the measurement. During this, the person assisting you must make sure their own head is very straight.

What is a standard Pupillary Distance?

Pupillary distance is different for each individual. The average adult’s pupillary distance is between 54 and 74 mm, while the average pupillary distance for children is between 41 and 55 mm. Since a person’s pupillary distance changes with physical development, it is important to consider that children may have different pupillary distances each year.

What is the difference between Monocular and Binocular PDs?

Monocular PD measures only one eye – usually the dominant eye – while Binocular PD measures both eyes to obtain a more accurate PD measurement. Considering that most frame styles need both eyes’ measurements for optimal comfort and fit, Binocular-PD measurement should be preferred over Monocular-PD measurement when selecting glasses. 

Plus, as modern frames come in numerous sizes and shapes, such as cat-eye it may not always be possible to replicate a fitting accurately with just one measurement from a frame you previously owned. Measure twice to ensure a perfect measurement!

How accurate does my pupillary distance have to be?

Pupillary distance has to be as accurate as possible to ensure you’re getting the best out of your prescription glasses. If you’re in doubt or have questions, head to our Optical Centre for more information and speak to one of our opticians online today.

Prism Glasses

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Prism Glasses

Prism glasses may effectively treat eye conditions such as double vision or other binocular vision difficulties. Our eye movements are controlled by six different muscles in each eye, and if one of these muscles is weak, it could cause eye strain, headaches, or even double vision. 

What are prism lenses?

Prism lenses may be prescribed by eye doctors but do not correct any refractive errors like farsightedness or nearsightedness, as they do not contain any focusing power. Temporary prism lenses, called Fresnel prisms, are made of vinyl and are attached to your eyeglasses. This is an excellent option for those wanting to try prism lenses before getting permanent ones or if your double vision is temporary. More permanent prism lenses are usually made of plastic or glass, are wedge or triangle shaped and are infused into regular lens prescriptions. 

How do prism glasses work?

In order to see clearly, light entering the eye must focus on the retina, the area at the back of the eye where light images are translated and sent to the brain. When your eyes are misaligned, they don’t move accurately together, and images are formed on different parts of the retinas, causing double vision. 

Prism glasses compensate for this misalignment by bending and redirecting the light rays on the retina, aligning and producing a clear image. This bending of light improves eye alignment, helping you to see comfortably and prevent double vision.

Why do people see double?

Double vision, or diplopia, is a condition in which you see two of everything. Any misalignment of the eyes may cause you to see double, making it difficult to judge distances, read and perform everyday tasks. Double vision may signify a more severe problem, so you should speak with your eye doctor if you experience it. 

Prism glasses for double vision

Double vision can sometimes be treated with eye exercises, or your doctor may give you a temporary prism to attach to your glasses. If the temporary prisms help your double vision, prisms may then be added to your prescription lenses. A prism bends the light before it travels through the eye and directs it to the right place on the retina, allowing the brain to fuse the two images together to produce one clear image.

What do prism glasses look like?

If using temporary prisms, these are typically more visible as they are attached to your glasses. If your eye doctor prescribes prism lenses for long-term use, these prisms will be fused into your regular lenses. They will look the same as before, but the glass on one side might be thicker. If this is a concern, consider a thicker frame to hide it. 

What does a prescription for a prism look like?

Your glasses prescription will show you all of the details on the type of vision you have. Numbers indicate how strong lenses need to be and where they should be positioned within the frame. If there is a number in the ‘PRISM’ portion of your prescription, you have a weak eye muscle that needs correction. The ‘BASE’ section will explain how the prism should be aligned. 

PRISM – diopters measure the amount of prism correction needed (from 0.5PD, 1.0PD, 1.5PD and so on) and indicate how misaligned your eyes are. If the power required is high, it can be split into two since alignment is a function of both eyes. 

BASE– depending on your double vision, the prism is placed vertically or horizontally in one or both lenses. It may be on the outer edge of the lens (Base Out, BO), the inner edge (Base In, BI), or at the top (Base Up, BU) or bottom edge (Base Down, BD).

In the above prescription, between the axis and ADD value, there are the prism specifications. There are two main factors to highlight when you read your prescription with prism lenses:

  1. The first value will be indicated by a number between 0.5 and 5.0. This refers to the amount of prism correction needed. Some specialised labs can also produce prescriptions above 5.0.
  2. This number is then followed by B (base). The base is the part of the lens that will be thicker and indicate the direction of the prism. There is BO (base out), BI (base in), BD (base down) and BU (base up).

How to order prism glasses online

Ordering prism glasses at SmartBuyGlasses is easy. After choosing the pair that best suits you, select your lenses. First, decide the type (distance, progressive, reading, or non-prescription). You will then be prompted to either fill in your prescription manually, upload it, send it later, or choose from your account. Below are the details for entering manually.

  1. Enter distance corrected under SPH for the left and right eye 
  2. Astigmatism details go under CYL and AXIS
  3. PD* (pupillary distance)
  4. Select ‘add prism’ for a small fee and input the prism correction values 

*PD is necessary to calculate correctly; an incorrect value can cause visual discomfort. You can get the correct measurement at your local optician or calculate it yourself with these easy steps in measuring your PD.

Ask our in-house opticians if you have any doubts about how to read and fill out your prescription online.

Prism lenses for daily life

Double vision can be uncomfortable and prevent you from doing everyday activities. Adding a prism to your lenses can restore your vision and improve your quality of life. With an endless possibility of frame choices and an easy way to enter your prescription online, there is no reason double vision should continue impacting your life. 

Ask the Optician

ASK NOW

Prism Glasses

Prism glasses may effectively treat eye conditions such as double vision or other binocular vision difficulties. Our eye movements are controlled by six different muscles in each eye, and if one of these muscles is weak, it could cause eye strain, headaches, or even double vision. 

What are prism lenses?

Prism lenses may be prescribed by eye doctors but do not correct any refractive errors like farsightedness or nearsightedness, as they do not contain any focusing power. Temporary prism lenses, called Fresnel prisms, are made of vinyl and are attached to your eyeglasses. This is an excellent option for those wanting to try prism lenses before getting permanent ones or if your double vision is temporary. More permanent prism lenses are usually made of plastic or glass, are wedge or triangle shaped and are infused into regular lens prescriptions. 

How do prism glasses work?

In order to see clearly, light entering the eye must focus on the retina, the area at the back of the eye where light images are translated and sent to the brain. When your eyes are misaligned, they don’t move accurately together, and images are formed on different parts of the retinas, causing double vision. 

Prism glasses compensate for this misalignment by bending and redirecting the light rays on the retina, aligning and producing a clear image. This bending of light improves eye alignment, helping you to see comfortably and prevent double vision.

Why do people see double?

Double vision, or diplopia, is a condition in which you see two of everything. Any misalignment of the eyes may cause you to see double, making it difficult to judge distances, read and perform everyday tasks. Double vision may signify a more severe problem, so you should speak with your eye doctor if you experience it. 

Prism glasses for double vision

Double vision can sometimes be treated with eye exercises, or your doctor may give you a temporary prism to attach to your glasses. If the temporary prisms help your double vision, prisms may then be added to your prescription lenses. A prism bends the light before it travels through the eye and directs it to the right place on the retina, allowing the brain to fuse the two images together to produce one clear image.

What do prism glasses look like?

If using temporary prisms, these are typically more visible as they are attached to your glasses. If your eye doctor prescribes prism lenses for long-term use, these prisms will be fused into your regular lenses. They will look the same as before, but the glass on one side might be thicker. If this is a concern, consider a thicker frame to hide it. 

What does a prescription for a prism look like?

Your glasses prescription will show you all of the details on the type of vision you have. Numbers indicate how strong lenses need to be and where they should be positioned within the frame. If there is a number in the ‘PRISM’ portion of your prescription, you have a weak eye muscle that needs correction. The ‘BASE’ section will explain how the prism should be aligned. 

PRISM – diopters measure the amount of prism correction needed (from 0.5PD, 1.0PD, 1.5PD and so on) and indicate how misaligned your eyes are. If the power required is high, it can be split into two since alignment is a function of both eyes. 

BASE– depending on your double vision, the prism is placed vertically or horizontally in one or both lenses. It may be on the outer edge of the lens (Base Out, BO), the inner edge (Base In, BI), or at the top (Base Up, BU) or bottom edge (Base Down, BD).

In the above prescription, between the axis and ADD value, there are the prism specifications. There are two main factors to highlight when you read your prescription with prism lenses:

  1. The first value will be indicated by a number between 0.5 and 5.0. This refers to the amount of prism correction needed. Some specialised labs can also produce prescriptions above 5.0.
  2. This number is then followed by B (base). The base is the part of the lens that will be thicker and indicate the direction of the prism. There is BO (base out), BI (base in), BD (base down) and BU (base up).

How to order prism glasses online

Ordering prism glasses at SmartBuyGlasses is easy. After choosing the pair that best suits you, select your lenses. First, decide the type (distance, progressive, reading, or non-prescription). You will then be prompted to either fill in your prescription manually, upload it, send it later, or choose from your account. Below are the details for entering manually.

  1. Enter distance corrected under SPH for the left and right eye 
  2. Astigmatism details go under CYL and AXIS
  3. PD* (pupillary distance)
  4. Select ‘add prism’ for a small fee and input the prism correction values 

*PD is necessary to calculate correctly; an incorrect value can cause visual discomfort. You can get the correct measurement at your local optician or calculate it yourself with these easy steps in measuring your PD.

Ask our in-house opticians if you have any doubts about how to read and fill out your prescription online.

Prism lenses for daily life

Double vision can be uncomfortable and prevent you from doing everyday activities. Adding a prism to your lenses can restore your vision and improve your quality of life. With an endless possibility of frame choices and an easy way to enter your prescription online, there is no reason double vision should continue impacting your life. 

Photochromic vs. Polarised Lenses

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Photochromic vs. Polarised Lenses

Sunglasses are a versatile accessory; they protect your eyes and make you look cool. You may put a lot of thought into the frame of your glasses or sunglasses, but choosing the right lenses is just as important. With so many lenses available, it may be difficult to understand which are right for you. The best lenses for an individual will depend on your unique visual needs and what you hope to get from your shades. Photochromic and polarised lenses are two of the many lens choices which offer excellent UV protection, but many wonder, what exactly is the difference?

What is the difference between photochromic and polarised lenses?

Photochromic and polarised lenses both effectively protect your eyes from harmful UV rays. They’re both available in a diverse range of frame styles and are highly beneficial to wearers. The difference? Simply put, photochromic lenses start clear and darken upon coming into contact with UV light. In contrast, polarised lenses are always tinted and have a special coating that’s especially good at blocking glare.

What are photochromic lenses?

Photochromic lenses, also known as Transitions® lenses, are an excellent choice for people who are sick of switching between their prescription glasses and prescription sunglasses. As light conditions change, so do the lenses. And the best part, you never have to change your frames. Inside, away from UV light, photochromic lenses are clear, but as soon as you step outside and UV rays are present, they gradually darken.

Plastic photochromic lenses and glass photochromic lenses use the same technology but are a bit different in their composition. Plastic photochromic lenses include molecules of silver halide that are usually layered or embedded evenly onto the surface of the lens, providing an even tint when exposed to UV light conditions. Glass photochromic lenses contain the molecules within the glass. This can sometimes cause an irregular tint on lenses with a higher prescription due to the uneven thickness of the lens.

How do photochromic lenses work?

It’s all about a chemical reaction. Photochromic lenses have light-sensitive molecules that shift their structure when combined with UV light. When this light is absorbed, the lenses darken. Away from the UV light, the process reverses, and the lenses become clear again. On average, photochromic lenses darken in 30–60 seconds and clear a bit slower in 2–3 minutes.

The molecules in photochromic lenses are not only sensitive to the presence of UV light but also the amount of it. A lot of UV light and they will change more quickly; less light and they’ll change more slowly. If you find yourself in the shade, you might notice your lenses darkening less than in direct sunlight. UV light is still present in low light, overcast skies, causing photochromic lenses to darken even in these conditions. 

What are polarised lenses?

Polarised lenses are tinted lenses with a special coating that blocks glare, boosts visibility, increases clarity and enhances contrast to make your surroundings more vibrant. Polarised sunglasses are handy for people who spend a lot of time outdoors, as they block out reflections that come from rain, snow, or water. When the sun reflects off these surfaces, it causes a powerful, horizontal glare that may cause eye damage and strain.

How do polarised lenses work?

Polarised lenses are coated in a chemical filter that acts as a vertical blocker and won’t allow any horizontal wavelengths through. When light hits a flat object, like a lake, ski slope, or metal sheet, the reflection is in a single, concentrated direction, creating a bright polarised glare. Polarised glare means the light waves are mostly aligned in one direction, in this case, horizontally. As polarised lenses are designed to block this horizontally polarised light, their chemical filter absorbs it, letting you see clearly.

Advantages and disadvantages of photochromic lenses

One of the biggest advantages is how cost-effective and convenient photochromic lenses can be. With no need for a separate pair, one pair of glasses acts as both your eyeglasses and sunglasses. Photochromic glasses prevent you from worrying about changing your glasses upon entering or exiting a building or the sunshine. Photochromic lenses are beneficial when the weather changes throughout the day; if the sun is going in and out of the clouds, you’re on the slopes or hiking in the woods.

While photochromic glasses benefit many wearers, there are some disadvantages to consider. Temperature impacts the rate at which photochromic lenses darken or clear up. The lenses usually darken more fully in cold weather but take longer to clear. In warmer weather, they may not darken as much but will become clear quicker. Most photochromic lenses perform well for three-plus years, but eventually, they will become less reactive to light conditions and take longer to shift between clear and tinted. 

It is important to note that some photochromic lenses are unsuitable for driving because the car windshield blocks the UV rays that generally cause the lenses to adjust. Some models, including the Transitions XTRActive® lenses, have more photochromic molecules allowing them to transition even while in the car. These lenses always have a very light base tint and will not go as dark in the car as outdoors. 

Advantages and disadvantages of polarised lenses

Whether hiking, cycling, or boating, polarised sunglasses are a great option. The lenses are designed to reduce glare and enhance outdoor vision, helping improve performance while making colours look more vibrant. Polarised lenses are well suited for driving during the day, as glare from other cars, or the road is a common scenario. With reduced glare comes a lower risk of eye strain. Polarised lenses are an excellent solution for people with light sensitivity, and they may even be recommended to patients who have had cataract surgery.

With many advantages, there are some things to consider before buying polarised lenses. Polarised lenses may reduce vision clarity when looking at LCD screens or certain displays. For anyone working in a job where looking at display screens is expected, you should test polarised lenses before purchasing. 

While polarised lenses are beneficial in snowy conditions, they may make it harder to see patches of ice. If you’re skiing, snowboarding, driving, or walking where there might be lots of ice, it may be best to avoid your polarised sunglasses and reach for another pair. Another disadvantage is that polarised lenses are always tinted, so if you wear prescription glasses, you will need to carry your glasses and sunglasses. 

Is photochromic or polarised better?

Photochromic and polarised lenses have distinct qualities and advantages, making them great options for your collection. Generally, neither is considered better than the other. Photochromic lenses are a great option for those who are always on the run, with one pair of glasses serving as eyeglasses and sunglasses. Polarised lenses block out glares and reflections, not only improving vision but providing a level of safety. 

Both lenses will protect your eyes from the sun’s harmful ultraviolet light. The best choice is always individual, so it is encouraged that you review the functionalities, consider your environment and budget, and compare this to your lifestyle. If you still have questions, head to our Optical Centre and speak with one of our opticians. 

Photochromic or polarised lenses, which to buy?

Depending on what you use your sunglasses for, one may be a better choice than the other. If a reduction in glare will benefit your performance in fishing or cycling, for example, you may choose polarised lenses. Photochromic lenses may be best for you if you need a pair of sunglasses for everyday wear.

Lenses don’t have to be complicated; consider the differences and your needs, so you can buy and wear what works for you. With so many options, it’s always best to be informed about your choices. Learn more about lenses, and remember, whether you purchase photochromic or polarised, make sure they fit into frames that make you feel confident.

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Photochromic vs. Polarised Lenses

Sunglasses are a versatile accessory; they protect your eyes and make you look cool. You may put a lot of thought into the frame of your glasses or sunglasses, but choosing the right lenses is just as important. With so many lenses available, it may be difficult to understand which are right for you. The best lenses for an individual will depend on your unique visual needs and what you hope to get from your shades. Photochromic and polarised lenses are two of the many lens choices which offer excellent UV protection, but many wonder, what exactly is the difference?

What is the difference between photochromic and polarised lenses?

Photochromic and polarised lenses both effectively protect your eyes from harmful UV rays. They’re both available in a diverse range of frame styles and are highly beneficial to wearers. The difference? Simply put, photochromic lenses start clear and darken upon coming into contact with UV light. In contrast, polarised lenses are always tinted and have a special coating that’s especially good at blocking glare.

What are photochromic lenses?

Photochromic lenses, also known as Transitions® lenses, are an excellent choice for people who are sick of switching between their prescription glasses and prescription sunglasses. As light conditions change, so do the lenses. And the best part, you never have to change your frames. Inside, away from UV light, photochromic lenses are clear, but as soon as you step outside and UV rays are present, they gradually darken.

Plastic photochromic lenses and glass photochromic lenses use the same technology but are a bit different in their composition. Plastic photochromic lenses include molecules of silver halide that are usually layered or embedded evenly onto the surface of the lens, providing an even tint when exposed to UV light conditions. Glass photochromic lenses contain the molecules within the glass. This can sometimes cause an irregular tint on lenses with a higher prescription due to the uneven thickness of the lens.

How do photochromic lenses work?

It’s all about a chemical reaction. Photochromic lenses have light-sensitive molecules that shift their structure when combined with UV light. When this light is absorbed, the lenses darken. Away from the UV light, the process reverses, and the lenses become clear again. On average, photochromic lenses darken in 30–60 seconds and clear a bit slower in 2–3 minutes.

The molecules in photochromic lenses are not only sensitive to the presence of UV light but also the amount of it. A lot of UV light and they will change more quickly; less light and they’ll change more slowly. If you find yourself in the shade, you might notice your lenses darkening less than in direct sunlight. UV light is still present in low light, overcast skies, causing photochromic lenses to darken even in these conditions. 

What are polarised lenses?

Polarised lenses are tinted lenses with a special coating that blocks glare, boosts visibility, increases clarity and enhances contrast to make your surroundings more vibrant. Polarised sunglasses are handy for people who spend a lot of time outdoors, as they block out reflections that come from rain, snow, or water. When the sun reflects off these surfaces, it causes a powerful, horizontal glare that may cause eye damage and strain.

How do polarised lenses work?

Polarised lenses are coated in a chemical filter that acts as a vertical blocker and won’t allow any horizontal wavelengths through. When light hits a flat object, like a lake, ski slope, or metal sheet, the reflection is in a single, concentrated direction, creating a bright polarised glare. Polarised glare means the light waves are mostly aligned in one direction, in this case, horizontally. As polarised lenses are designed to block this horizontally polarised light, their chemical filter absorbs it, letting you see clearly.

Advantages and disadvantages of photochromic lenses

One of the biggest advantages is how cost-effective and convenient photochromic lenses can be. With no need for a separate pair, one pair of glasses acts as both your eyeglasses and sunglasses. Photochromic glasses prevent you from worrying about changing your glasses upon entering or exiting a building or the sunshine. Photochromic lenses are beneficial when the weather changes throughout the day; if the sun is going in and out of the clouds, you’re on the slopes or hiking in the woods.

While photochromic glasses benefit many wearers, there are some disadvantages to consider. Temperature impacts the rate at which photochromic lenses darken or clear up. The lenses usually darken more fully in cold weather but take longer to clear. In warmer weather, they may not darken as much but will become clear quicker. Most photochromic lenses perform well for three-plus years, but eventually, they will become less reactive to light conditions and take longer to shift between clear and tinted. 

It is important to note that some photochromic lenses are unsuitable for driving because the car windshield blocks the UV rays that generally cause the lenses to adjust. Some models, including the Transitions XTRActive® lenses, have more photochromic molecules allowing them to transition even while in the car. These lenses always have a very light base tint and will not go as dark in the car as outdoors. 

Advantages and disadvantages of polarised lenses

Whether hiking, cycling, or boating, polarised sunglasses are a great option. The lenses are designed to reduce glare and enhance outdoor vision, helping improve performance while making colours look more vibrant. Polarised lenses are well suited for driving during the day, as glare from other cars, or the road is a common scenario. With reduced glare comes a lower risk of eye strain. Polarised lenses are an excellent solution for people with light sensitivity, and they may even be recommended to patients who have had cataract surgery.

With many advantages, there are some things to consider before buying polarised lenses. Polarised lenses may reduce vision clarity when looking at LCD screens or certain displays. For anyone working in a job where looking at display screens is expected, you should test polarised lenses before purchasing. 

While polarised lenses are beneficial in snowy conditions, they may make it harder to see patches of ice. If you’re skiing, snowboarding, driving, or walking where there might be lots of ice, it may be best to avoid your polarised sunglasses and reach for another pair. Another disadvantage is that polarised lenses are always tinted, so if you wear prescription glasses, you will need to carry your glasses and sunglasses. 

Is photochromic or polarised better?

Photochromic and polarised lenses have distinct qualities and advantages, making them great options for your collection. Generally, neither is considered better than the other. Photochromic lenses are a great option for those who are always on the run, with one pair of glasses serving as eyeglasses and sunglasses. Polarised lenses block out glares and reflections, not only improving vision but providing a level of safety. 

Both lenses will protect your eyes from the sun’s harmful ultraviolet light. The best choice is always individual, so it is encouraged that you review the functionalities, consider your environment and budget, and compare this to your lifestyle. If you still have questions, head to our Optical Centre and speak with one of our opticians. 

Photochromic or polarised lenses, which to buy?

Depending on what you use your sunglasses for, one may be a better choice than the other. If a reduction in glare will benefit your performance in fishing or cycling, for example, you may choose polarised lenses. Photochromic lenses may be best for you if you need a pair of sunglasses for everyday wear. Lenses don’t have to be complicated; consider the differences and your needs, so you can buy and wear what works for you. With so many options, it’s always best to be informed about your choices. Learn more about lenses, and remember, whether you purchase photochromic or polarised, make sure they fit into frames that make you feel confident.