What Is Rimless Glasses – Everything You Need to Know

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By Emma Moletto
Reviewed by Sharlene McKeeman FBDO
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.
Are frameless eyeglasses right for you? Find out!
man wearing rimless glasses

We know the endless choices of frames are overwhelming, so why not make it easier and try a pair of rimless glasses? This article will cover what rimless glasses are and what you need to know before buying your first pair. Discover the pros and cons of wearing rimless glasses and whether they are an affordable alternative to prescription glasses for you.

What are rimless glasses?

Rimless glasses, or frameless eyeglasses, are glasses with no frame. The nose bridge connects the lenses, and the temples are directly attached to the lenses. In the late 19th and early 20th centuries, the first widely available version of rimless glasses came as prince-nez. These glasses pinched the nose and didn’t have earpieces. Manufacturers went to a great extent to keep these glasses secure on the nose. Around World War 1, a version with two temple arms and a nose bridge emerged.

In the coming decades, various other structural improvements were implemented, including nose pads, changing the type of screws, and different style variations. Rimless glasses help bring more focus to your face and allow for a subtle look. In the 21st century, frameless glasses are usually made with quality, lightweight, and durable materials, such as titanium, as they are more delicate than standard glasses.

rimless glasses

What are the pros and cons of rimless glasses?

Like any pair of glasses, rimless glasses have features that appeal to some people rather than others. Let’s look into why rimless glasses may or may not be for you.

What are the advantages of rimless eyeglasses?

  • Cost-effective
  • Subtle – nearly invisible on your face
  • Lightweight
  • You can look fashionable, professional, or casual, depending on the model

What are the disadvantages of rimless glasses?

  • Delicate and more prone to breakage since there’s no frame
  • Not for those who want their glasses to show off their vibrant personalities
  • Not available in all frames styles
  • Not available for all prescription lenses (see next paragraph)

Consider the pros and cons to decide whether rimless eyeglasses are for you. If you like them and need prescription lenses, then let’s find out if frameless eyeglasses are suitable for your vision.

Can I get rimless glasses with a high prescription?

Prescription rimless eyeglasses are not suitable for high prescriptions. Indeed, it is not recommended to wear your frameless glasses if your prescription is higher than -6.00. Strong prescriptions have thicker lenses and need extra support, like semi-rimeless and full-rim glasses in plastic or metal frames. However, depending on the lens material and your prescription details, you might get away with frameless glasses, even with a high index. Consult our certified online opticians for more advice. 

Progressive lenses can be fitted to a rimless pair of glasses and work as effectively as other progressive prescription glasses (always depending on your prescription). The same goes for tinted lenses and transitions. You should have a regular eye test to have an updated version of your prescription. If you are unsure what your existing prescription is before buying a pair of rimless glasses, you can use our Lens Scanner tool and get the result straight to your phone.

Best lens material for rimless glasses

The lenses in frameless eyeglasses are more exposed than full or semi-rimmed glasses, so they’re more prone to breakage. Therefore, rimless glasses depend on certain types of lens materials. 

Standard plastic or glass lenses work best with full-rimmed glasses as they are fully covered. The lenses are more exposed in rimless glasses, and with glass or standard plastic lenses, they’d lack impact resistance. So, frameless eyeglasses depend on the quality and robust lens materials, and with high prescriptions, thicker lenses require more stability. 

High-quality plastic lenses, like Arise Collective™ Clarity Lenses  are a good option for frameless glasses with low prescriptions. They are lighter and thinner than standard glasses lenses and also offer UV protection and impact resistance. Higher prescriptions may require thicker lenses, which mean a heavier pair of glasses. High-index lenses are a great way to avoid heavy rimless glasses since they offer superior impact resistance.

DID YOU KNOW?

The best lens material for rimless glasses is high-quality plastic, such as our Arise Collective™ Clarity Lenses . With higher prescriptions, it is recommended to opt for high-index lenses for superior impact resistance and comfort.

How much do rimless glasses cost?

One of the pros of rimless eyewear is that it is cost-effective, so you won’t need to exceed your budget. 

You can find affordable rimless glasses and designer eyewear to suit your every eye need and personal style. If you love durable sporty glasses, try Oakley rimless glasses, or discover our Arise Collective for something more eco-chic. 

How to adjust rimless glasses

Rimless glasses need extra delicacy when it comes to small repairings. To adjust loose screws, remove them from the frames, insert a new screw, and tighten them with a jeweller’s screwdriver. Tighten it up to the point where it becomes difficult to turn to avoid cracking the lens where the hinge and lens meet.

You can also slightly adjust the nose pads to make the glasses sit higher or lower on your face. Be careful when doing this with rimless progressive glasses, as they may alter your vision while wearing them. Undoubtedly, it’s always best to visit your local opticians for assistance.

Alternatives to rimless glasses

So, what are rimless glasses? Imagine a pair of prescription glasses without a frame, just the lenses, nose bridge, and temples. 

After reading our article, you should have a better understanding of why some people prefer to wear rimless glasses and may want to try them yourself. Remember to take extra care of frameless glasses, as the lenses do not have the additional support full or semi-rimmed glasses may offer. 

If you’ve decided that rimless glasses are not the best option for your needs, you may want to explore different types of glasses to find what you love among trendy and practical everyday eyewear.

How to Adjust Glasses

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How to Adjust Plastic Glasses

Key points | How to tighten | How to loosen | Tilted glasses | Professional help

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.
Read our helpful guide on how to adjust your plastic glasses frames to get your perfect fit!
tortoiseshell glasses

If you recently purchased a new pair of plastic frames, congratulations! Now comes the tricky part: adjusting them to feel perfectly secure on your face every time you put them on. It’s common knowledge that buying the right glasses is only half of the battle – it’s just as crucial to ensure your glasses or sunglasses fit correctly for maximum comfort and vision. Read on to learn essential tips and tricks to ensure you get all-day convenience from your new specs.

How to adjust plastic glasses frames: the key points

  • To make any slight adjustments to the frame, run any plastic parts under hot water or heat with a hair dryer for 30-60 seconds and then carefully bend.
  • If the frame slides down your face, bend the earpiece closer to a 90-degree angle to tighten the fit. If it hurts the back of your ear because it’s too tight, do the opposite and make it less of an angle.
  • Never try to bend or adjust any plastic frame parts without first heating up the frame. This will break them!

How to tighten plastic glasses

Frequently pushing up your glasses because they’ve slid down your nose can be irritating, but adjusting your glasses to fix this is easy.

Firstly, soak the arms of your glasses for 30-60 seconds in warm water. Then apply gentle downward and inward pressure on the end of the arms. This gives a tighter fit behind the ear, which should prevent your glasses from slipping.

HELPFUL TIP: In summer, glasses and sunglasses are more likely to slide down your nose due to factors like perspiration and sunblock. If tightening the frames isn’t doing the job, try using a gripping wax or nose pads on the nose pelts to stop the slippage.

Plastic frame glasses
Plastic frame glasses

How to loosen plastic glasses

Glasses that pinch your nose are not only uncomfortable, but that prolonged pressure can cause headaches or migraines. With a few simple steps, you can easily adjust your plastic glasses frames for a personalized fit and optimum comfort.

Firstly, ensure your hands are clean so you don’t risk damaging the frames. Then, after you’ve soaked the arms of your glasses in warm water for 30-60 seconds, gently apply upward and outward pressure on the end of the arms to achieve a wider fit.

Keep trying on the glasses, testing them out until you get just the right amount of space, as too much bending will damage your spectacle frames. Now enjoy your perfect fit!

Plastic frame glasses
Plastic frame glasses
DID YOU KNOW?

Loosening your plastic glasses seems like a complicated task, but in fact it is easily doable at home. Apply outward pressure to warmed glasses frames to gently loosen the fit.

How to adjust plastic frame glasses if they are tilted

Your eyewear plays an integral part in your eye health, so it’s essential that you adjust your glasses frames properly to ensure maximum comfort and protection. Although the process of adjustments is simple, it is essential to remember not to force the plastic of your glasses too much. Plastic is a brittle substance and can break easily if dealt with incorrectly. 

If you are struggling to adjust your frames, do not fret! Visit a professional optician; they are highly capable of modifying any type of plastic frame with precision. With their expert help, you’ll be able to adjust your glasses in no time!

When to visit a professional

If you notice that one side of your frames appears higher than the other, you need to adjust the arms of your glasses (the part of the frames that hooks behind your ear). After soaking the arms of your glasses for 30-60 seconds in warm water, follow the steps below:

If the right side is higher than the left, bend the left arm down at the hinge or where the arm bends behind your ear. 

If the left side is higher than the right, gently bend the right arm down at the hinge or where the arm bends behind your ear.

Thinnest Lenses for High Prescription – What Are My Options?

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By Hannah Tinning
Reviewed by Sharlene McKeeman FBDO
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.
Lenses with a 1.74 index are the thinnest lenses for high-prescription wearers and include many benefits.

Finding glasses with thin and aesthetically pleasing lenses can be challenging for those with high prescriptions. Thick lenses can create the “coke bottle effect” protruding from the face and limiting your frame options. Not only do they look unappealing, but they also add extra weight, discomfort and risk of damage to the glasses. Luckily, advancements in manufacturing techniques have made it possible to create extra-thin lenses for glasses wearers with high prescriptions.

What are the thinnest lenses for high-prescription glasses?

What are the thinnest lenses for high-prescription glasses?

The thinnest lenses for high-prescription glasses are lenses that have a 1.74 index. These lenses are made from high-index plastic, which allows for a thinner and lighter lens compared to traditional lenses made from regular plastic.

The thin profile of 1.74 index lenses is thanks to the flatter curve that is utilised compared to standard, lower index lenses. Using a flatter curve, however, can lead to peripheral distortion. This is counteracted by integrating aspheric lens technology, which eliminates spherical aberration

Thanks to the development of high-index lenses, manufacturers can provide far slimmer eyewear lenses than in the past. If you are accustomed to a strong prescription in standard plastic, then making the change could significantly affect the thickness of your lenses. While even the thinnest lens cannot entirely hide the thickness of a high prescription lens 100%, it will drastically reduce how much it is seen. 

Thinnest eyeglass lenses at SmartBuyGlasses

Thinnest eyeglass lenses at SmartBuyGlasses

At SmartBuyGlasses, there’s a variety of lens indexes you can select from that cater to different prescription needs. From standard 1.50 index lenses to high-index lenses such as 1.67 and 1.74, a range of options ensures you can find the right lens you need. You can also select Arise Collective™ Clarity lenses that provide breakthrough lens technologies, optimised visual acuity and state-of-the-art protection for any prescription and frame.

Lens index
Lens index

The higher the index lens, the more beneficial it will be if you have a strong prescription. Thanks to the reduced thickness and weight, you’ll still achieve comfortable wear and an aesthetically pleasing look. However, when selecting your lens index, you want to make sure you’re consulting your eye doctor before making the decision yourself. 

If you decide to go with the thinnest glasses lenses, you can choose from a range of different frame styles. With a 1.74 lens index, you can explore styles with delicate metal frames.  

DID YOU KNOW?
At SmartBuyGlasses, lenses with a 1.74 lens index are ultra-thin and come with four lens coatings. With flatter Aspheric technology to improve your vision and enhance the aesthetics of your eyewear, they are the complete optical lens solution.

Are 1.74 lenses worth it?

Are 1.74 lenses worth it?

1.74 index lenses are worth it for individuals with strong prescriptions who want thin, lightweight glasses. However, they do come at a higher cost than lenses that use older technology and present lesser qualities. Of course, the higher price point comes from the thinness and the incorporated benefits.

  •  Weight. 1.74 index lenses can be more than 25% lighter than normal plastic lenses and more than 50% lighter than glass lenses.
  • Scratch resistance. High-index lenses have a higher resistance to scratches than standard plastic meaning you can dodge the hassle of distracting marks in your field of vision.
  • UV protection. 1.74 index lenses have UV400 protection which means they can filter out up to 99% of UVA and UVB rays.
  • Aspheric technology. They have a flatter surface, which results in clearer, more natural vision.
  • Anti-reflective. These high-index lenses will also aid in reducing glare and reflections, resulting in better visual clarity and less eye strain.
  • Super-hydrophobic. At SmartBuyGlasses, these lenses come with a super-hydrophobic coating that repels water, dust and dirt, keeping the lenses cleaner and clearer.
Lens index benefits
Lens index benefits

Are the thinnest eyeglass lenses for me?

Are the thinnest eyeglass lenses for me?

If you face the challenge of having a high prescription and finding glasses with thin lenses, then 1.74 index lenses might be for you. The benefits of thin lens glasses include being ultra-thin and lightweight, scratch-resistant, UV protected and super-hydrophobic. It’s important to note that you should always consult an eye doctor or one of our online optician before deciding on your next pair of prescription glasses.  

What are Plano Lenses?

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What are Plano Lenses?

By Caitlin Biwer
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.
Discover why plano lenses are great for the workplace, sports, or to provide a realistic aesthetic to your look!
woman with plano lenses
SUMMARY

Plano lenses are eyeglasses lenses that don’t offer any vision correction.

They are generally used for aesthetic, safety and eye health reasons.

Glasses have many benefits, even if you have perfect vision. In this article, we will explain plano lenses, demo lenses, and the difference between plano lenses and prescription lenses. 

Discover why plano lenses are great for the workplace, sports, or to provide a realistic aesthetic to your look!

What are Plano lenses?

Not all glasses require corrective lenses, and when this occurs, glasses can be fitted with two types of non-prescription lenses: demo or plano lenses. 

Furthermore, plano lenses are optical lenses that do not have any value power. Therefore, they do not help correct your vision. 

In the eyewear industry, plano-convex lenses are described as flat and do not refract or focus light through the lens. 

So if you have blurry vision, see double or can’t read the words right in front of you, then plano glasses are not going to help.

We recommend that you have an eye test to find out if you do not require any prescription to correct your vision. 

For example, you may need a prescription from your eye doctor to correct astigmatism to improve distance vision (progressive lenses) or you may even need a prescription suitable for reading glasses

If you notice any changes in vision or have not had an eye test with your doctor in two years, we recommend booking an appointment.

What does Plano mean on eye prescription?

The word plano is Latin for ‘flat’, and if this is found in the SPH section of your prescription, it means you do not require nearsighted or farsighted correction. 

You will know if you require plano lenses if your eye prescription refers to ‘plano’, ‘PL’ or ‘0.00’, found under the sphere box (SPH) measurement section.

DID YOU KNOW?

If 0.00 is written on your eyeglass prescription, this is equivalent to plano. This indicates that there is no refractive power and no corrective power is needed. Therefore, you do not have any distance problems with your sight, astigmatism or anything to be corrected.

What are demo lenses?

Another type of non-prescription is demo lenses, and they are mainly used for demonstration purposes, such as for glasses displays in retail stores. 

Demo lenses can help you understand what prescription glasses or sunglasses look like before you purchase them.

Plano vs demo lenses

Plano and demo lenses are not the same and should not be confused. Plano lenses are often made from CR39 lens material and are thicker than demo lenses. 

In addition to this, extra protective lens coatings can be added to a plano lens that can’t be added to demo lenses, like the following:

  • Anti-scratch coating
  • Blue light filter
  • Tinted lens coatings

Demo lenses are thinner, do not have any additional lens coatings, and sometimes also have printed brand labels on the lens. They are like a simulation of what the glasses can look like.

What are Plano lenses used for?

The various reasons why you’d want or need to wear plano glasses are:

  1. Aesthetic reasons: If you’re looking to change up your look, make a fashion statement, or add the finishing touch to your outfit, you might opt for plano lenses. They can be helpful in boosting a look or helping to frame an outfit without any vision correction.
  2. Safety reasons: In many workplaces, companies have to follow protective eyewear regulations to help prevent eye-related injuries. Safety glasses can help protect from hazardous elements such as chemicals. During the working day, you can also protect your eyes from glare or blue light emitted from digital devices with blue light glasses. Once you have chosen a pair of glasses you like, you can add blue light to them.
  3. Eye health issues: If you are blind in one eye or suffer from eye health issues, you may benefit from protecting your eyes with plano lenses.
glasses prescription

Do you need Plano lenses?

If you are looking for eyewear for any of the reasons mentioned previously, then you may need plano glasses. 

You can wear any style of glasses or sunglasses with plano lenses and benefit from protective lens filters, such as UV protection. Plano lenses in glasses can also serve as protective eyewear, whether or not you need vision correction or prescription lenses.

You can even find plano contact lenses. So what does plano mean in contact lenses? Plano contact lenses are the same as plano in glasses; they do not help correct visual impairments. 

Usually, plano-coloured contact lenses fall into this category of non-prescription contacts that people wear mostly for cosmetic purposes.

Wear Plano glasses

Don’t need prescription glasses but still want to benefit from the trends, styles and protective lens coatings that eyeglasses and sunglasses provide? Plano lenses are what you are looking for.

Eyewear with plano lenses does not have any power values for vision correction and can also be used as PPE (personal protective eyewear). 

Whether you need to protect your eyes at work, on holiday or simply want to look fashionable, you can try to wear plano lenses. 

You can find a variety of eyewear with quality protective filters to help correct vision or improve your look with SmartBuyGlasses.

We recommend visiting your local optometrist for an up-to-date prescription to ensure you do not require single-vision lenses or progressive lenses with corrective power. If you need some quick advice, contact our online optician!

How To Get Used to Glasses

What's the best way to get used to new glasses?

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Buying a new pair of prescription glasses can help you with clearer vision, but it can also cause discomfort at first. If you are new to glasses, it is crucial to know that many factors play into adjusting to a new pair.

New prescription glasses can cause dizziness or headaches even if you’re a glasses wearer. If you want to find out why that happens and need a few tips on adjusting to new glasses, keep reading this article.

How long does it take to adjust to new glasses?

Adjusting to new glasses is different for everyone. For some, it takes a few days; for others, it takes more. Not only do your eyes muscles have to adjust to the new lenses, but your brain has to adjust too. The adjusting time frame depends on many factors; it can either be based on the complexity of your prescription or the type of lenses you choose. If you are a glasses wearer, adjusting to a new prescription can also depend on your personal sensitivity or for how long you wore your last pair of glasses. Progressive lenses, for example, tend to be the hardest to get used to.

Is it normal for new glasses to feel weird?

The short answer is yes; new glasses can feel weird. As we already said, getting used to either having a new prescription or starting to wear glasses takes some time. While some symptoms may be expected and typical, it is still essential to analyse what is happening and understand if what you’re experiencing is common and temporary or if the glasses are not right for you. 

If this is your first time wearing glasses, it is important to understand where the discomfort comes from. Is it from the lenses? Or is it from the frames? Having glasses sit on your face all day can be quite unpleasant the first few days; if the back or your ears hurt and you have severe nose marks, you may have chosen the wrong glasses size. You may also consider selecting a pair of frames made with lightweight materials like titanium.

Is it normal for glasses to be blurry at first?

Having blurry vision the first few days of wearing new prescription glasses is very common. With time passing, the blurriness should gradually begin to fade. Please consult an eyecare specialist if no improvement happens over the first few days. Your prescription may need to be corrected, and continuing to wear the glasses may cause damage to your vision.

Is it normal to feel dizzy with new glasses?

Dizziness is another common symptom during the first few days of wearing new glasses. Your brain may struggle to adapt to the new prescription, making you feel dizzy, nauseous, and lightheaded. While these symptoms are unpleasant or not what you expect when wearing glasses, they are usually short-lived and disappear in a few days. If, after a few days, the discomfort is still there, please consult an eye specialist.

Do new glasses give you a headache?

Headaches and eyestrain are commonly associated with new prescription glasses. The discomfort is more likely normal, so don’t panic. New lenses usually make your eye muscles respond differently compared to the old lenses or compared to not wearing lenses at all. Listed below, you will find four useful tips on how to help get used to new glasses.

Is there an adjustment period for new glasses?

As already mentioned, the adjusting period is different for everyone. While some may get used to the new prescription in a couple of days, others may need 5-6 days to start seeing clearly without experiencing discomfort. 

It is crucial to note that although experiencing headaches, eye strain, dizziness, and blurry vision is expected, if the symptoms are severe and no improvement is visible after the first few days, you must consult an eye care specialist. Wearing the glasses for an extended period while experiencing these discomforts is not advised, as it may damage your vision.

Best way to adjust to new glasses

If you’re new to wearing glasses and are looking for tips on what to do to ease the adjusting process, here are some tips for you: 

  1. Wear the glasses as much as your eye doctor advised: do not avoid wearing your glasses or go back to your old ones. Your eyes need to adjust to the new prescription, so wear them as much as advised.
  2. Give your eyes some rest. When experiencing eye strain, it is essential to give your eyes some rest. Remove the glasses, close your eyes, and take some time with your eyes closed to give them a break.
  3. Make sure you move your head: first-time glasses wearers tend to avoid moving their heads because of the new feeling of having them on their heads. Move your head as usual; the glasses will not fall off your face; if they do, you might need to check the size. 
  4. Clean your glasses regularly. Even the smallest amount of dirt can increase discomfort for new glasses wearers, so make sure you clean the glasses regularly using a microfiber cloth and an optical spray. Remember to store the glasses in their case when not wearing them to avoid scratches. 

If you have more questions regarding prescription glasses, you can head to our Optical Centre and ask our certified opticians for help.

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How To Get Used to Glasses

Buying a new pair of prescription glasses can help you with clearer vision, but it can also cause discomfort at first. If you are new to glasses, it is crucial to know that many factors play into adjusting to a new pair.

New prescription glasses can cause dizziness or headaches even if you’re a glasses wearer. If you want to find out why that happens and need a few tips on adjusting to new glasses, keep reading this article.

How long does it take to adjust to new glasses?

Adjusting to new glasses is different for everyone. For some, it takes a few days; for others, it takes more. Not only do your eyes muscles have to adjust to the new lenses, but your brain has to adjust too. The adjusting time frame depends on many factors; it can either be based on the complexity of your prescription or the type of lenses you choose. If you are a glasses wearer, adjusting to a new prescription can also depend on your personal sensitivity or for how long you wore your last pair of glasses. Progressive lenses, for example, tend to be the hardest to get used to.

Is it normal for new glasses to feel weird?

The short answer is yes; new glasses can feel weird. As we already said, getting used to either having a new prescription or starting to wear glasses takes some time. While some symptoms may be expected and typical, it is still essential to analyse what is happening and understand if what you’re experiencing is common and temporary or if the glasses are not right for you. 

If this is your first time wearing glasses, it is important to understand where the discomfort comes from. Is it from the lenses? Or is it from the frames? Having glasses sit on your face all day can be quite unpleasant the first few days; if the back or your ears hurt and you have severe nose marks, you may have chosen the wrong glasses size. You may also consider selecting a pair of frames made with lightweight materials like titanium.

Is it normal for glasses to be blurry at first?

Having blurry vision the first few days of wearing new prescription glasses is very common. With time passing, the blurriness should gradually begin to fade. Please consult an eyecare specialist if no improvement happens over the first few days. Your prescription may need to be corrected, and continuing to wear the glasses may cause damage to your vision.

Is it normal to feel dizzy with new glasses?

Dizziness is another common symptom during the first few days of wearing new glasses. Your brain may struggle to adapt to the new prescription, making you feel dizzy, nauseous, and lightheaded. While these symptoms are unpleasant or not what you expect when wearing glasses, they are usually short-lived and disappear in a few days. If, after a few days, the discomfort is still there, please consult an eye specialist.

Do new glasses give you a headache?

Headaches and eyestrain are commonly associated with new prescription glasses. The discomfort is more likely normal, so don’t panic. New lenses usually make your eye muscles respond differently compared to the old lenses or compared to not wearing lenses at all. Listed below, you will find four useful tips on how to help get used to new glasses.

Is there an adjustment period for new glasses?

As already mentioned, the adjusting period is different for everyone. While some may get used to the new prescription in a couple of days, others may need 5-6 days to start seeing clearly without experiencing discomfort. 

It is crucial to note that although experiencing headaches, eye strain, dizziness, and blurry vision is expected, if the symptoms are severe and no improvement is visible after the first few days, you must consult an eye care specialist. Wearing the glasses for an extended period while experiencing these discomforts is not advised, as it may damage your vision.

Best way to adjust to new glasses

If you’re new to wearing glasses and are looking for tips on what to do to ease the adjusting process, here are some tips for you: 

  1. Wear the glasses as much as your eye doctor advised: do not avoid wearing your glasses or go back to your old ones. Your eyes need to adjust to the new prescription, so wear them as much as advised.
  2. Give your eyes some rest. When experiencing eye strain, it is essential to give your eyes some rest. Remove the glasses, close your eyes, and take some time with your eyes closed to give them a break.
  3. Make sure you move your head: first-time glasses wearers tend to avoid moving their heads because of the new feeling of having them on their heads. Move your head as usual; the glasses will not fall off your face; if they do, you might need to check the size. 
  4. Clean your glasses regularly. Even the smallest amount of dirt can increase discomfort for new glasses wearers, so make sure you clean the glasses regularly using a microfiber cloth and an optical spray. Remember to store the glasses in their case when not wearing them to avoid scratches. 

If you have more questions regarding prescription glasses, you can head to our Optical Centre and ask our certified opticians for help.

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Do Blue Light Glasses Help With Night Driving

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Do Blue Light Glasses Help With Night Driving?

By Elise Snedden
Reviewed by Beck Jinette
Beck Jinette

Reviewed by

Beck Jinette
Beck has over 17 years of experience in eyecare and holds her Certificate IV in Dispensing in Australia.
It’s no secret that low light conditions make night driving more difficult, but can blue light glasses help to improve visibility at night?
man driving a car wearing driving glasses

Blue light glasses have become quite popular for those who use technology daily, which is likely most of us as we are living in a multi-screen era.

They help filter out the harmful blue light rays emitted from digital screens, offering protection from their negative effects

While we understand how they work to protect against screens and minimise blue light exposure, we have begun to question the other benefits of blue light glasses beyond the digital screen.

Driving at night can sometimes be stressful, with low levels of natural light combined with glare from high powered LED headlights.

It may be even more difficult for people who wear prescription glasses or suffer from vision issues – it’s no wonder why some people tend to stay off the road at night. 

With increased exposure to blue light on the road with LED headlights and street lamps, what if the blue light glasses we reach for at our computer screens could also help us drive at night?

What are blue light glasses?

Blue light-blocking glasses are exactly what they sound like; they’re glasses that have special lenses with a blue light filter that help with preventing blue light coming from digital screens from passing through the lens.

This reduction in exposure to blue light allows us to concentrate further reducing eye fatigue or digital eye strain.

Blue light is a part of the visible light spectrum that produces short and high-energy waves, and can be seen by the human eye.

Although our eyes can see blue light, they cannot effectively filter it, allowing more light to pass through. 

Some blue light filters result in slightly yellow tinted lenses, which block the harmful blue light rays from passing through the lens and into the eye. 

infographic showing how blue light filtering lens works

Blue light blocking glasses have become quite popular among those who use technology daily, which is most of us.

Blue light blocking lenses help filter the harmful artificial blue light rays emitted from digital screens and digital devices. 

While we understand how they work to protect against screens, we’ve begun to question the other benefits of wearing these glasses.

Blue light glasses and night blindness

Clear visibility is an integral part of safe driving for all involved: drivers, passengers and pedestrians.

With the low levels of natural light in the evenings, we have to compensate with car headlights, street lamps and other bright lights in order to see.

However, with the use of these artificial light sources comes an increase in glare, which greatly impacts our visibility while on the road. 

People with night blindness (nyctalopia) have difficulty seeing at night, including nighttime driving.

Nyctalopia makes it difficult for the eye to adjust to low-light environments causing blurred vision, cloudy vision, sensitivity to bright light or difficulty seeing into the distance.

Night blindness is not a condition itself, but a result of existing eye conditions, which presents differently depending on the underlying issue. Some common causes of night vision problems include:

  • Glaucoma
  • Cataracts
  • Nearsightedness (myopia)
  • Vitamin A deficiency

Similar to how blue light glasses filter light, night driving glasses have yellow-tinted lenses intended to block blue light coming from artificial light sources, reduce headlight glare and to improve visibility in low light conditions while on the road.

For those who experience night blindness, blurry vision, digital eye strain or other vision impairments, these lenses might not completely restore the ability to drive safely under certain circumstances.

Blue-light blocking glasses can help reduce eye strain and fatigue when driving at night, allowing for a more comfortable journey.

Although they may offer some relief from uncomfortable symptoms like headaches caused by prolonged exposure to bright lights after dark, you should consult your doctor to discuss what may be causing you to experience these symptoms.

Do blue light glasses work for night driving?

Car headlights and most street lights are now made with LED lights which emit high levels of blue light.

This can make driving at night challenging because of the blue light glare these bulbs cause, and when combined with existing vision issues, can make driving at night dangerous.

Simple blue light glasses may reduce glare and filter blue light from these LED lights.

Although many who wear blue light glasses claim that they have reported seeing positive effects on their overall health, there is no direct link showing that wearing blue light glasses or night driving glasses work to improve low-light visibility.

What type of glasses help with nighttime driving?

Although clear blue light glasses or yellow lenses may not be the best option for night driving, there are still other options to help improve our vision at night.

A great option might be to add an anti glare coating, or anti-reflective (AR) coating, to your next pair of prescription glasses.

While regular prescription lenses allow 92% of light to pass through the lens, anti glare coatings allow 99.5% of light to pass through, reducing the amount of reflections on the lenses.

image showing difference in vision while wearing regular lenses vs. anti-reflective lenses

Although they don’t filter high energy blue light, this reduction of reflections on your lenses in turn reduces the glare of oncoming headlights more effectively than yellow tinted glasses and blue light lenses.

This anti-reflective coating can also be applied to sunglasses allowing you to further reduce glare and protect your eyes from natural blue light like UV light and brightness from the sun during the day.

How can I improve my vision while driving at night?

Some ways to improve your vision while driving at night include:

  • Clean your glasses regularly because smudges can worsen glare.
  • Keep your windshield clear of all debris and streaks – dust and streaks can amplify the glare from light sources.
  • Try to keep your dashboard lights dim to reduce eye strain.
  • Utilise headlights to increase visibility, and keep them clean and fog free as this can dim their brightness.
  • Avoid looking directly at oncoming headlights.
  • Schedule regular check ups with your eye doctor to keep your prescription for your eyeglasses up-to-date, and catch any other issues that may occur.

The best solution might not be the same for everyone, and will depend on your overall eye health, needs and preferences, so it’s important to speak with your eye doctor immediately if you have trouble seeing or driving at night.

For more information, check out our Optical Centre where you can find more informative articles about wearing blue light glasses and anti-reflective lenses, or speak to one of our certified opticians.

Glasses Measurements: Everything You Need To Know

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It's important to know your glasses measurements when buying eyewear online. This useful guide explains the significance of the numbers printed on your glasses and how to take the measurements yourself.
Eyeglasses measurements

In the past, shopping for eyeglasses involved tedious trips to eyewear stores, fitting frames, and perusing a few shelves of glasses. That’s not so much the case anymore; online retailers like SmartBuyGlasses have been established for years, and, as a result, there is a near-unlimited amount of colours, sizes, and eyewear designs on sale.

When buying online, knowing your glasses’ measurements is crucial. That is why we’ll explain what glasses measurements are and how to find them.

Eyeglass size explained

You may have noticed all glasses have three numbers engraved on the temples. They represent the glasses’ measurements: the lens width, bridge size, and temple arm length, respectively. Dots, dashes, or vertical bars usually separate these numbers. Some frames may have a fourth number, which refers to the height of the frames.

In some cases, acetate frames will have the eye size and bridge size on the nose pads on a plastic frame. All these glasses measurements are measured in millimeters (mm).

Eyeglasses frame dimensions
DID YOU KNOW?

Pupillary distance is the distance between your pupils. To have the clearest vision, the distance between the center of the left lens and the right lens should be the same as the distance between your pupils.

Eyeglass frame measurements

The frame width is the horizontal measurement of the frames, including hinges or designs that stick out at the sides. To measure the width of the frames, take a measuring tape or a ruler and measure the entire horizontal front of the frame from the further extended point to the other.

Eyeglass lens measurements

Lenses can be measured both in height and width. The lens height is the vertical measurement of the eyeglass lenses. This is important for bifocal lenses and progressive lenses. Lens width refers to the width of the lenses, which must be measured horizontally.

This typically ranges from 40 mm to 60 mm. To take these measurements, place the measuring tape on the lenses, first vertically, then horizontally, and only measure from one side of the lens to the other, ensuring no part of the frames is included.

How to measure your bridge size for glasses

The bridge size is the distance between the two rims or lenses of the eyeglasses where the nose pads are located. It typically ranges from 14mm to 24mm. Place the measuring tape right between the two lenses to measure the bridge and see how many millimeters are between the nearest points. 

How to measure your temple length for glasses

This refers to how long the temple is. Measure your temples from the hinge to the tip, and you’ll come up with the temple length. Usually, it’s between 120mm and 150mm.  

How to find out PD for glasses

The pupillary distance is another crucial measurement when ordering glasses online. To find out your pupillary distance, you can either use our online tool or do it manually with the help of a ruler.

Step 1: Standing in front of a mirror, hold the ruler up to the bridge of your nose or against your eyebrows.

Step 2: Close your right eye. While looking in the mirror, align the ruler’s zero with your left pupil.

Step 3: Keeping the ruler still, close your left eye and open your right eye.

Step 4: Read the number aligned with your right pupil’s center. This number is your pupillary distance.

Step 5: Repeat the process to ensure you get the most accurate result.

If you struggle doing it yourself, you can ask a friend to help you with this and check out our quick and easy tutorial.

I’ve measured my glasses

Now that you have all the information on your glasses’ measurements and know how to take them, it will be way easier when shopping online. Glasses’ measurements won’t be a mystery anymore, and you will confidently be able to choose the right pair of glasses.

If you need help determining what glasses size will fit best, we have an easy guide to help with that. You will have to measure your temples from one side to the other and check out our size table to find the recommended size based on your measurements.

If you have more questions regarding your glasses size or prescription, head out to our Optical Center. Our informative articles will help answer your questions, or ask one of our certified online opticians to clarify your doubts.

What are blue light glasses?

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By Emma Moletto
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.
Discover how blue light affects our eyes and dive into how blue light glasses work.
Disclaimer: Blue light glasses are intended to benefit individuals who spend long hours in front of digital screens or are exposed to artificial blue light sources. However, it’s important to note that the scientific evidence supporting these benefits is still evolving, and individual experiences may vary.

Have you ever finished your gaming session or work day with tired and irritated eyes?

In today’s digital era, our lives are intricately intertwined with screens, from smartphones and laptops to tablets and e-readers.

As we navigate this digital landscape, we often overlook the potential implications of prolonged screen exposure on our eye health and overall well-being.

That’s where blue light-blocking glasses step in, offering a potential solution to the problems caused by blue light emitted from digital devices.

What is blue light?

Blue light refers to a specific range of electromagnetic radiation within the visible light spectrum.

Blue light rays are at the high end of the visible light spectrum and have the shortest yet most powerful wavelength (380-460nm).

Blue light waves are the closest to invisible waves and ultraviolet rays, which are known to be the most dangerous of all light waves.

Because of its higher energy, blue light is more likely to scatter in the atmosphere, which is why the sky appears blue during the day.

So is blue light harmful?

It’s important to note that not all blue light is harmful. Blue light is present naturally in sunlight (largest source of blue light) and plays a crucial role in regulating our circadian rhythms.

The primary concern arises from excessive exposure to artificial sources of blue light, particularly from digital devices, LED lighting and energy-efficient light bulbs. 

Therefore, it is best to be safe and protect your eyes from blue light with a pair of blue light-blocking glasses.

The purpose of blue light glasses

The primary purpose of blue light-blocking glasses is to reduce digital eye strain and discomfort caused by digital devices (that emit blue light).

When we spend long hours in front of computers, smartphones, tablets or other electronic screens, we expose our eyes to higher levels of blue light than what they would naturally encounter from daylight.

Symptoms of digital eye strain (also known as computer vision syndrome) may include eye fatigue, dry eye syndrome, blurry vision, headaches, discomfort in the neck and shoulders and difficulty falling asleep. 

Blue light-blocking glasses work by selectively blocking or filtering out a portion of the blue light spectrum, aiming to reduce these potential negative effects.

By wearing blue light-filtering glasses, some individuals report experiencing less eye strain and improved comfort while using a digital device for extended periods.

DID YOU KNOW?

The most common symptoms of the negative effects of blue light are: eye fatigue, dry eyes, blurry vision, headaches and discomfort in the neck and shoulders.

What are the benefits of blue light glasses?

Blue light-blocking glasses are designed to mitigate the potential negative effects of excessive blue light exposure from digital screens.

While the scientific evidence supporting their benefits is still evolving, many users who wear plano and prescription glasses with a blue light filter report experiencing some positive results.

Reduced eye strain

Prolonged screen time can lead to digital eye strain, which may cause symptoms like dry eyes, blurred vision, headaches and eye discomfort.

Blue light-blocking glasses can help reduce eye strain by filtering out a portion of the blue light that contributes to these symptoms.

Improved sleep quality

Blue light exposure, especially during the evening or nighttime, can suppress the production of melatonin, a hormone that regulates sleep.

Wearing glasses that block blue light in the evening or using devices with blue light filters can help maintain the body’s natural circadian rhythms and improve sleep patterns.

Enhanced comfort

People often report feeling more comfortable when using a computer screen and other devices while wearing blue light glasses, as the glasses can help reduce the harsh glare and intensity of screens.

Potential retinal protection

Some studies suggest that excessive exposure to blue light, particularly high-energy blue-violet light, might contribute to retinal damage over time.

Blue light glasses with specific coatings may offer protection against potential long-term damage, although more research is needed to establish this and other benefits conclusively (Dawnie et al. 2019).

Minimised risk of macular degeneration

Some researchers believe that long-term exposure to blue light could be associated with an increased risk of age-related macular degeneration (AMD) (Zhao et al. 2018).

Wearing blue light glasses might help reduce this risk by limiting the amount of harmful blue light reaching the eyes, safeguarding your macular health.

When should you use blue light glasses?

Since blue-blocking glasses filter out possible harmful wavelengths of light, they are best worn in situations where you risk being exposed to too much blue light.

This includes almost all electronic devices with screens – so, whether you’re watching television, checking your phone or working at a computer, blue light-blocking glasses can prevent sleep issues and minimise your risk of eye strain, headaches and difficulty sleeping. 

We suggest wearing blue light-filtering glasses:

  • On extremely bright, sunny days
  • In front of a computer monitor (i.e. when playing video games)
  • When using your phone (especially at night)
  • When a migraine feels imminent

When having long sessions of extended screen time, it is strongly recommended to safeguard your visual performance by taking frequent breaks, wearing computer glasses and making sure the device is at least at arm’s length.

Are blue light glasses really necessary?

If you worry about the impact of blue light on your eyes and sleep patterns, you may consider trying a quality pair of blue light-blocking glasses, especially if you have a lifestyle that involves extensive screen use. 

As always, it’s a good idea to consult with an eye care professional to determine the best approach for your specific needs.

References

Downie, L. E., Keller, P. R., Busija, L., Lawrenson, J. G., & Hull, C. C. (2019), Blue‐light filtering spectacle lenses for visual performance, sleep, and macular health in adults. The Cochrane Database of Systematic Reviews2019(1), CD013244.
https://doi.org/10.1002/14651858.CD013244

Zhao, Z. C., Zhou, Y., Tan, G., & Li, J. (2018). Research progress about the effect and prevention of blue light on eyes. International journal of ophthalmology11(12), 1999–2003.
https://doi.org/10.18240/ijo.2018.12.20

How a Pair of Glasses Could Help Migraine Headaches

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By Hannah Tinning
Reviewed by Sharlene McKeeman FBDO
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.
Migraine and tension headaches are known to cause vision and eye discomfort. Luckily different lenses can help reduce these symptoms.
How a Pair of Glasses Could Help Migraine Headaches

Migraine headaches cause sensory discomfort, which often affects our vision and eye comfort. It is estimated that almost half of the world’s population suffers from headaches, with 42% suffering from tension headaches and 11% from migraines.

Thanks to improving lens technology, you can relieve migraine symptoms with migraine glasses like transitional lenses, reflective sunglasses, tinted lenses and blue light-blocking glasses.

How do glasses for migraine relief work?

How do glasses for migraine relief work?

If you’re prone to light sensitivity, migraine glasses can relieve headaches by filtering out certain types of bright lights, like fluorescent lighting, that can trigger migraines or worsen symptoms. These glasses typically have special light sensitivity lenses that can block blue light and other certain wavelengths known to trigger migraines in some people. 

By reducing the amount of triggering light levels that reach the eyes, these glasses can help to reduce the frequency and severity of migraine episodes, improving your quality of life. 

If you are experiencing headaches, it is essential to research your symptoms to determine what type you have to know which glasses you need to wear for relief. Migraine glasses may not be effective for other types of headaches, such as tension or sinus headaches, which require different treatments.

What is a migraine headache, and how are they caused?

What is a migraine headache, and how are they caused?

It is believed by researchers that migraine episodes result from abnormal communication between nerves, chemicals and blood vessels in the body and brain. Migraine attacks usually start with an intense throbbing on the side of your head. They can spread all over the head and to the back of the neck as they worsen.

Migraine headaches
Migraine headaches

Eye strain is one factor that can bring on migraine attacks. When our eyes are fatigued from prolonged use, such as staring at a computer screen for long periods, the brain can become overstimulated and trigger a migraine. 

Eye strain can also cause tension in the muscles around the eyes and neck, contributing to migraines. If you’re experiencing migraines, be sure to speak to your eye doctor to rule out vision problems.

DID YOU KNOW?
While there are no glasses specifically made to combat migraine headaches, different lenses with red tints, blue light blocking filter or photochromatic add-ons can help reduce the frequency and intensity.

What is the difference between tension and migraine headaches?

What is the difference between tension and migraine headaches?

A tightening feeling around the head is often a sign that you’re suffering from a tension headache; intense throbbing indicates a migraine. Though not always the case, moderate to severe headaches can clearly show signs that you suffer from a migraine rather than a tension headache.

According to the Health Line (Health Line 2023), Scientists believe there is a spectrum of headaches, with tension headaches at one end and migraine at the other. It’s possible to have a mixed tension migraine with characteristics of both a tension headache and a migraine headache.

What are ocular migraines?

What are ocular migraines?

Ocular migraines, or retinal migraines, are a rare form of migraine that is characterised by blurry vision or even temporary vision loss in one eye. It is believed that spasms of blood vessels cause this type of chronic migraine in the retina. 

While rare, ocular migraines can cause permanent vision damage, so you must see a doctor if you believe you’re experiencing these symptoms. Ocular migraines cannot be treated with glasses alone.

Ocular migraines vs. migraine auras?

Ocular migraines vs. migraine auras?

While ocular migraines are a type of visual migraine, auras are a symptom of regular, recurring migraines. A migraine “aura” is a sensory disturbance, such as flashes of light, blurry vision or other vision problems before a migraine strikes, and can last anywhere from 5-60 minutes. 

While no glasses are developed to treat migraine auras specifically, you can significantly reduce the effects of migraine auras as you would with migraine photophobia, opting for eyewear to protect the eye from certain harmful light rays.

What is photophobia?

What is photophobia?

While there are many symptoms of migraines, one of the most painful and commonly reported migraine pains is photophobia or extreme light sensitivity. Photophobia is not a condition but a symptom of another underlying complication, such as migraine attacks. It results from the connection between the cells in your eyes that detect light and the nerves that go to your head, making it a common complaint among migraine patients.

What glasses are best for migraines?

What glasses are best for migraines?

Migraine glasses
Migraine glasses

When choosing glasses for migraines, looking for lenses that can effectively block harmful light and reduce eye strain is essential. Some of the best migraine glasses include those with FL 41 lenses, which can filter out certain wavelengths of light that are known to trigger migraines. It’s important to note that at Smartbuyglasses, these lenses are not stocked.

Other glasses you can buy at SmartBuyGlasses that may be beneficial for migraines are those with photochromatic, polarised or blue light lenses, which can reduce glare, block certain colours and improve visual clarity. Anti-reflective coatings and red-tinted glasses can also be useful for reducing glare and minimising eye strain.

How can photochromic lenses help with migraine headaches?

How can photochromic lenses help with migraine headaches?

Photochromic sunglasses can help with migraine episodes by reducing the amount of light that enters the eyes. Photochromic lenses, also known as transitional lenses, are eyeglass lenses that darken in response to ultraviolet (UV) light. They contain special molecules that react to UV light, causing the lenses to darken when exposed to sunlight or other UV light sources.

Photochromic lenses
Photochromic lenses

A migraine attack can often be triggered by bright light or glare, which can cause discomfort and pain in the eyes. By wearing glasses with photochromic lenses, you can help reduce the amount of light that enters your eyes, which can help reduce migraine frequency and intensity. You can easily turn your prescription glasses into photochromatic glasses to reduce eyestrain as well.

What other migraine sunglasses are there?

What other migraine sunglasses are there?

Reflective sunglasses are one type of migraine sunglasses that can help prevent migraine triggers by blocking bright light and glare. They are designed with a reflective coating, helping to reflect harmful UV rays and reduce glare. Wearing sunglasses with reflective lenses is also helpful for people with light sensitivity, as they help to reduce the brightness of light that enters the eyes. 

Another type of migraine sunglasses that can be beneficial is those with polarised lenses. Polarised lenses have a unique filter that blocks reflected light, reducing glare and improving visual clarity. They are particularly useful for people who suffer from migraines triggered by bright sunlight or glare. They can be combined with other lens features, such as prescription glasses, anti-reflective coatings and UV protection, to enhance their effectiveness and provide maximum eye protection.

Can blue light glasses help with migraines?

Can blue light glasses help with migraines?

Blue light exposure from digital screens has been linked to triggering migraines, so blocking blue light with specialised glasses can help reduce the frequency and intensity of migraine attacks. Additionally, blue light glasses can help reduce eye strain and improve sleep quality, which can be beneficial for migraine sufferers who experience these symptoms. 

Blue light glasses infographic
Blue light glasses infographic

However, it’s important to note that blue light glasses may not work for everyone and should not be used as the sole management strategy for migraines. Identifying and avoiding other migraine triggers like light sensitivity, fluorescent lighting and harsh light is still crucial. We suggest speaking with your eye doctor or seeking medical treatment if necessary.

Do migraine glasses really work?

Do migraine glasses really work?

While there is no cure for migraines, glasses with specialised lenses can help with light sensitivity and reduce the frequency and intensity of migraine episodes and ease photophobia symptoms. Transitional lenses, reflective sunglasses, tinted lenses, blue light-blocking glasses and polarised lenses are just a few types of prescription lenses and glasses that can benefit migraine sufferers. Speak to one of our online opticians to see which lens type will be best for you.

Reference list

Reference list

Health Line. (2018, September 3). Mixed Tension Migraine. Health Line. Retrieved March 22, 2023, from https://www.healthline.com/health/mixed-tension-migraine

Lowest Prescription for Contacts

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Lowest Prescription for Contacts

By Claire Capuano
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.
Contact lenses are becoming more advanced and available for those in need of vision correction for nearsightedness, farsightedness or astigmatism.
Contact lenses

Contact lenses have become much more comfortable, breathable and versatile since they were first designed in the 19th century. 

The earliest versions were blown from glass, so it’s no wonder they were less popular than they are now. Today, contact lenses are thin, plastic lenses used for vision correction. 

Contact lenses differ from glasses as they are worn directly on the cornea, the front surface of the eye. Contact lenses adhere to the shape of the eye, allowing a wider field of vision and fewer distortions or obstacles than prescription glasses

Are glasses prescriptions and contact lens prescriptions the same?

The lens power in glasses and contact lenses can correct nearsightedness, farsightedness, or astigmatism. Just as contact lenses and glasses are not worn in the same way, their prescriptions also differ

Glasses generally rest about 12 mm from the eyes, whereas contacts are worn directly on the eyes and have a much smaller surface area. The distance from the eye directly impacts the difference in lens power.

A prescription for eyeglasses and contact lenses will require separate eye exams and measurements from your optometrist as the prescriptions will differ. 

Additionally, with so many types of contact lenses available it is important a correct fit and brand is prescribed. 

Ordering contact lenses with the wrong prescription can lead to symptoms such as blurry vision, headaches, eye strain or fatigue and eye pain (AAO, 2012).

How to read a contact prescription

If you’ve received an eye exam, got your new prescription and are ready to buy contact lenses online but need clarification, you’re not alone! 

Codes like “D, CYL and AXIS” are all over your prescription, but what do they mean?

Many people need different levels of vision correction in each eye, so a contact lens prescription may have two sets of numbers—one for your right eye and one for your left eye. 

OD, oculus dexter, refers to your right eye, while OS, oculus sinister, refers to your left eye.

  • Base Curve (BC) determines the type of fit required for the lens to meet the curve of your eye. It is measured in millimeters (mm) and aligns with the curvature of your eye.
  • Power (PWR)/Sphere (SPH) refers to the strength of your prescription. You will see a plus sign (+) or a minus sign (-) followed by a number. If you are farsighted, your figure will begin with a plus sign. If you are nearsighted, it will start with a minus sign.
  • Diameter (DIA) is the entire width of your contact lenses. Also measured in millimeters, the higher the base curve, the flatter the cornea’s curvature.

If you need astigmatism correction, you will have two additional terms and numbers on the prescription. For those with astigmatism, you will need toric lenses.

  • Cylinder (CYL) represents the severity of your astigmatism and the additional visual requirements needed for vision correction.
  • Axis (AX) is measured in degrees and tells you where and how your astigmatism is located and oriented on your eye. 

For those with presbyopia or who need multifocal lenses, you will notice one or both of the following on your prescription.

  • Addition (ADD) determines the amount of correction you need to be able to see clearly at a close distance.
  • Dominant (D/N) identifies your dominant (D) and non-dominant (N) eye. The dominant eye usually prioritises distance vision, while the non-dominant eye prioritises near vision.

Your prescription will also include a brand of contact lenses. Contact lens boxes will include most of the prescription details on them as well. 

Different contact lens brands have distinct features and measurements, so it is important only to order the brand prescribed. If you want or need to switch brands, it is essential to let your eye doctor know.

contact lens prescription
contact lens prescription
DID YOU KNOW?

A glasses and contact lens prescription are not the same, it is important to get an updated eye exam before purchasing contacts.

DID YOU KNOW?
A glasses and contact lens prescription are not the same, it is important to get an updated eye exam before purchasing contacts.

What do the numbers mean in a contact prescription?

If you understand what the codes mean, you may still wonder what the numbers mean. BC and DIA will not be present on your glasses prescription, as they refer only to a contact lens prescription. 

Measured in millimetres, the BC is always a number between 8 and 9 and will align with the curvature of your eye. DIA is typically between 14 and 14.5 millimetres and determines the entire width of your contact lens.

The PWR or SPH (prescription strength) is measured in increments of 0.25 diopters. The further from zero, the stronger the vision correction needed. A negative number, -1.00, indicates nearsightedness. 

A positive number, for example, +2.00, indicates farsightedness.

CYL is always a negative number measured in increments of 0.25, showing the amount of astigmatism. AX is a number between 0 and 180 degrees, referring to the angle of correction needed. 

For those with presbyopia, the ADD figure is a positive number between 0.50 and 3.00.

If you still need help reading and understanding your contact lens prescription, contact your optometrist or head to our Optical Centre to speak with one of our opticians.

contact lens measurments
contact lens measurments

How long is a contact prescription good for?

Most contact lens prescriptions expire within one to two years of your last eye exam. Once your prescription has expired, it is important to see your eye doctor for a new contact lens prescription. 

Wearing the wrong prescription contacts may create discomfort and lead to further vision problems.

How low do contact prescriptions go?

Contact lenses are becoming more and more diverse and available for those in need of vision correction. Contact lenses are now offered at the lowest prescription of -0.25/+0.25. 

Many people neglect to wear their low-prescription eyeglasses because of inconvenience, but wearing low-prescription contacts might be a good solution as they can be considered less obstructive.

Contact lenses don’t interfere with equipment such as helmets, hats, or goggles. During sports or exercise, contact lenses don’t get in the way. 

They’re not at risk of falling off or breaking. Contact lenses are not usually affected by weather as they don’t fog up in the cold.

Correcting your vision and protecting your eyes at any prescription level is important. If you’re avoiding your glasses for ease and convenience, speak with your eye doctor about receiving an eye exam and switching to contact lenses.

What is the strongest contact lens prescription?

Advances in contact lens technology have made it so that contact lenses can be worn safely and comfortably by those with high-power prescriptions. 

Standard contact lenses are readily available in prescriptions from -12.00 to +8.00, and cylinder powers up to -2.25 or -2.75 for astigmatism correction. 

Extended-range lenses are also available with spherical powers of +15.00D to –20.00D and up to –5.75D in cylindrical powers (Contact Lens Spectrum, 2016).

Soft contact lenses with high powers have thicker edges compared to low-powered ones. These thicker edges may be less comfortable to wear and cause more dry eyes.

 Many people with high-power prescriptions choose RGP lenses (rigid gas permeable or ‘hard’) as they are smaller and thinner than a soft lens. 

RGP lenses don’t bend like soft lenses, but they let oxygen through so your eyes can breathe.

Advantages of contact lenses

While contact lenses might not be for everyone, many contact lens wearers won’t go back to standard eyeglasses. Contacts conform to your eye, reducing distortion and obstructions. 

They won’t stop you from playing sports or competing in outdoor activities. Contact lenses are also available in coloured lenses, so you can experiment with your eye colour.

With varying contact lens power, affordable contact lenses and varying lens materials, there are contact lenses for everyone. 

Based on your lifestyle, you can speak with your eye doctor about purchasing daily disposable lenses, weekly or monthly lenses.

Contact lenses prescription

Buying contact lenses doesn’t have to be confusing. They’re an excellent alternative for those looking to ditch their eyeglasses. It is important to remember that glasses and contact lens prescriptions are different.

Do not assume that any numbers on your glasses prescription will match your contact lens prescription. 

If you want to try contact lenses, schedule an eye exam to determine what you need and what lens type will best suit you. 

For people with vision problems, contacts are an effective, almost invisible tool. The thin lenses correct vision problems including nearsightedness, farsightedness and astigmatism. 

You can even wear contacts if you have presbyopia and need bifocals. As technology and medicine continue to advance, contact lenses are only improving. 

Speak with your eye doctor about getting a prescription for contact lenses and start seeing clearer and more comfortably. 

REFERENCES

  1. American Academy of Ophthalmology. (2012). Can outdated contact lenses harm your eyes? [Online]. Available at: https://www.aao.org/eye-health/ask-ophthalmologist-q/wearing-outdated-contacts 
  2. Contact Lens Spectrum. (2016). Specialty and Custom Soft Contact Lenses. [Online]. Available at: https://www.clspectrum.com/issues/2016/december-2016/specialty-and-custom-soft-contact-lenses