1-855-393-2891 We should also think about other lens materials that are available. Hi-index lenses are made of a special plastic material that refracts light in a different way than regular plastic lenses. It’s for nearsighted (-) single-vision prescriptions only. Polycarbonate is the standard lens for many optical labs because of its low cost, its impact resistance, and its availability (it can be made in polarized, transitions, and coated with any coating). As a rule of thumb, if you have a strong prescription, high-index is the way to go. Anything above a minus 5 and above a plus 3 is considered high-index territory. Suitable for prescriptions of SPH (-8 to +4) and CYL (+/- 2). A high-index eyeglass lens allows people with a stronger prescription to wear a lens that is lightweight and thin. Subscribe to our newsletter. Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. Getting new eyeglasses? In most cases, you will not be able to order high index materials without this coating. Polycarbonate lenses have an index of refraction of 1.59, and will generally be about 20% thinner than standard plastic lenses. This means the lenses are thinner and lighter. Aspheric is a type of lens design. They can sharpen your sight even further if you apply an anti-glare coati… Can scratch easier than some other materials. If you’re looking to tint your lenses to a dark shade, you can’t do so with high-index lenses. Oliver is an ABO Certified Optician and has been working in the eye care industry for over 15 years. High Index vs. Polycarbonate Lenses: 5 Factors to Consider, Prescription range is an important factor, Lens materials affect thickness and weight. This material is highly recommended for people in jobs that are high risk for eye injury and for anyone under the age of 18. Refractive index refers to the rate at which light bends as it passes through the plastic of the lens. Trivex lenses, in contrast, start around $200 for single-vision lenses. Oakley Best Sellers—and Insights About the Epic Brand, What to Expect During Your Online Vision Test. Prescription lenses are designed to refract light according to your prescription. Polycarbonate is used in 35% of all prescription glasses. Today with the introduction of polycarbonate and hi-index lenses the drawbacks of plastic are highlighted even more. It provides a thinner lens for SPHs of -8.25 to -10.00 or lower and covers CYLs of +/- 4.00 or lower. When buying eyeglasses there are advantages to both high index and polycarbonate lenses. You’ll get thinner lenses with superior optical clarity. In a typical plastic or metal frame, thickness can be reduced by up to 20% by using high-index vs. polycarbonate lenses. Heavier and less comfortable than high index lenses. Another example: both polycarbonate and high-index are available with polarized filters, but high-index may be limited to 2 colors whereas polycarbonate may offer 5. Oliver is the founder of Eye Influence. Polycarbonate makes sense as an outdoor eyewear material. Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. Can You Use Vision Benefits to Purchase Eyewear Online? Yeah, the latest polycarbonate lenses are really thinner than high index plastic lenses like 1.67 index lenses. With hi-index lenses, vision can be corrected with less material, making the lens much thinner. However, thinner lenses won’t necessarily mean they will weigh less. It’s ideal for stronger prescriptions with SPH that range around +3.00, – 3.00 to +6.00, – 6.00 and above. The higher the number, the thinner the lens. These lenses are super-thin but are also more expensive than the polycarbonate option. Transitions Signature Gen 8: What’s New in Photochromic Lenses? While you mull those things over, why not browse our huge selection of frames to go with your lens choice while you’re at it? Translation: high-index is the smart option for stronger prescriptions. The frames you select are what everyone will notice, but of course the lenses are responsible for correcting your vision. Let’s be friends! Just like the 1.53 mid-index Trivex and 1.59 polycarbonate lenses, the 1.74 lens cannot be tinted. Generally speaking, high-index is best suited for higher (more severe) prescriptions. If you have the high prescription in the eyes, you'd better choose the 1.67 index polycarbonate lenses which will not let you look nerd. Our polycarbonate lenses have a 1.59 index which, while quite thin, is more focused on durability than lightness. This ensures more comfortable glasses even if your farsightedness, nearsightedness, or astigmatism prescription is high. The lower the index, the more material is needed to accurately refract light. If your prescription isn’t quite as extreme (not in the range presented above), polycarbonate is a great choice. Plastic lenses can accept tint colors for the people that like a light tint on their lenses. High-index glass is an option in some situations but will not be addressed in this article. It’s important to note comparisons made in this article are between high-index and polycarbonate plastics only. Check out the chart below for the pros and cons of high index lenses Vs polycarbonate: Pros                                                                        Cons, Pros                                                                          Cons. High “abbe value” meaning less light scattering. These tints are available in a variety of colors including, brown, gray, yellow, red, blue, rose, green, and more. The lenses are a high-index plastic material. High index lenses have a refractive index (ability to bend light) of 1.60 or higher… High-index plastic lenses can greatly improve the eyeglasses you build. Scratch Resistance of Glass and Plastic Lenses. Polycarbonate lens material is best for impact resistance and cost reduction, as the material is affordable and extremely impact resistant. Avoids the ‘bug eye’ look that can occur with farsighted prescriptions. I generally recommended people with prescriptions anywhere between +/-0.50 to +/-4.00 to go with polycarbonate lenses. These lenses contain a high index of 1.6. Other high-index materials are classified by numbers. Plastics are graded in numbers, such as 1.50 or 1.67. Because of their durability, polycarbonate lenses are much less likely to break or fracture than even high index lenses. This material is useful if you live an active lifestyle. Additionally, they are lighter than both of those lenses despite only having a marginally larger index than polycarbonate. 1.6 High-index Lens – Super-thin Lenses. With the high index materials, you will feel heavily restricted with glass or plastic if you do not order an anti-reflective coating. Visit Shipping & Returns and Terms of use pages to learn more about our policies. The real winners are materials such as Trivex, CR-39 and Crown Glass. Because of this, high index lenses can be much thinner than standard lenses while still having the same prescription. Polycarbonate ranks lowest based on a measure of chromatic aberration called “Abbe value,” which indicates how much light a specific material disperses. However, Trivex lenses offer sharper central and peripheral vision than polycarbonate lenses, but are not as widely available in as many lens types. The higher the refractive index, the thinner the glass. It’s lightweight, strong and the lenses generally cost less. Polycarbonate comes with a coating which allows it to be tinted significantly darker than high-index. Copyright 2020 EZContacts.com. Progressive lenses … So we’ll examine the two most common lens materials here and present the advantages and disadvantages you should be aware of. Most customers base their decision on the price. So, whichever of our amazing frames you decide on, you know you’re getting a great deal! All Rights Reserved. If you’re like most, you probably put a lot more thought into selecting your frames than your lens material. The lenses have thinner edges with overall reduced weight. His books, videos and articles touch on various subjects, such as eye care, good tech habits, motivation and leadership. There are several coatings that make plastic lenses more durable. Most people can’t perceive the color distortion at these levels. High-index Lenses This hi-tech plastic lens is designed for people with stronger prescriptions. This material of lenses will provide the perfect eyeglasses for you. High-index plastic lenses have a refractive index between 1.6 and 1.74; the index of ordinary plastic and polycarbonate lenses … See our latest collections & exclusive offers before the crowd! Should you worry about Abbe value? Our polycarbonate lenses have a 1.59 index which, while quite thin, is more focused on durability than lightness. Polycarbonate lenses are up to 10 times more impact-resistant than regular plastic lenses thereby making these lenses an excellent choice for children’s glasses, sports eyewear and safety glasses. These filter out harmful blue light from digital screens which can cause eye strain. Recommended for anyone with a strong prescription (+/-4.0 or higher total power), 1.67 high-index lenses are up to 20% thinner than polycarbonate lenses. To optimize your experience we use cookies. Whether you decide to choose minimalist high index or tough polycarbonate lenses, all of the lenses we offer at EyeBuyDirect come with anti-scratch, anti-reflective, and UV protective coatings. Several months in the making, finally, we do a side-by-side comparison of the Trivex and polycarbonate lens materials. High-index vs. polycarbonate: which is clearer? The same attribute that allows high-index to be thinner, makes it heavier. Can Color Blind Glasses Help You See Color? Polycarbonate is by far the safest lens available. This one’s not a close call. Information about Polycarbonate Lenses: Polycarbonate High Index Lenses are a totally separate material from other plastics. When light enters the front surface of the lens and exits the back, its path is adjusted by the curves of the lens. For example, the latest Transitions technology or polarized color option will be an option for polycarbonate lens material first. Answered by Dr. Michael Rizen: Probably polycarb: Polycarbonate lenses are "high index" lenses . With prescriptions of this power, the reduced thickness with high-index will make-up for the increased weight. The higher the refractive index (how effectively the lens bend the light), the lighter the lenses. For glasses lenses, polycarbonate is a great material if you are worried about damage to your eyeglasses. Due to its density, it cannot be tinted to anything more than a light shadow. For example, if a polycarbonate lens requires 2 millimeters of material to refract light, high-index may only need 1 millimeter. Glasses tend to get quite thick at high correction, especially some low index (1.50) lenses. Backup Glasses: Stay Ready with Ultra-Affordable Options. Monday-Friday 9 a.m. - 12 a.m. EST Most people can’t perceive the color distortion at these levels. The higher the number, the thinner and lighter the lens. Do you often do sports while wearing your glasses? By visiting our website, you agree to our Privacy Policy. Probably not. Most high index plastic lenses are made with aspheric designs to optimize both the appearance and the optical performance of the lenses. Polycarbonate is the standard choice for almost all eyewear that requires shatter and/or chip resistance. 1.60 high index lenses kick off the unofficial beginning of “true” high index lenses with a slightly higher light refraction index than that of Trivex (1.53) and polycarbonate (1.59). Questions? These lenses are  super-thin but are also more expensive than the polycarbonate option. High-index lenses measure slightly better than polycarbonate. Polycarbonate lenses are made from a type of plastic that is famous for its durability. Another important property is that polycarbonate naturally blocks 100% UV light. Polycarbonate eyeglass lenses are a type of high-index lens that are also scratch and impact resistant and protect your eyes from UV. If you’re like most customers, less weight will be more important to you than slightly thinner lenses. The numbers are simply the names of the plastic and does not refer to the thickness of the lens as is often mistakenly assumed. Most of us use digital screens a lot, making this a great choice to protect our eye health. When compared to other lens materials, high-index nor polycarbonate are known to provide the ultimate in optical clarity. However, you should understand your choice will affect durability, visual clarity, and more. Another great feature to consider is digital screen protection lenses. Polycarbonate lenses are compatible with almost all popular lens add-on options. These cost an additional $30. Before making a decision like this, it’s important to understand all the pros and cons of high index lenses Vs polycarbonate. Polycarbonate may not be the wrong choice, but your lenses will be thicker. Thin lens glasses are very appealing to a lot of wearers because they generally appear more natural in thinner eyeglasses frames – the sides of the lenses are less visible. Aspheric is a type of lens design. Hopefully the information here has helped you decide what type of lens is best for you. Fitting Eyeglasses: A Guide to the Numbers on... 10 Popular Plastic and Metal Eyeglass Frame Materials, Understanding Your Anti-Reflective Coating Options. High index lens material is best for getting thin, lightweight lenses that reduce eye distortion and allow for an attractively thin profile to the lenses. It’s up to 10X more impact-resistant than high-index lenses and is therefore the ideal lens material for sports protective eyewear and children’s glasses. Standard polycarbonate lenses can range in price from $9 to $205, depending on your prescription and what add-ons you choose, including whether you need standard, bifocals, or progressives. Labs report that many orders for high index lenses are for weak corrections (less than one diopter), even though it is difficult to detect any visible thinning of the lens edges in those cases. Instagram @thiccpersephone Style #2018623 1.67 High Index Lense Sunglasses Clip-On in Amber Lens materials: Polycarbonate and 1.67 high index are different types of plastics used to make lenses for glasses. Hi-Index Lenses . Advantages of High-Index Lenses . Polycarbonate has a higher index of refraction than Trivex (1.58 vs. 1.53), so polycarbonate lenses are about 10 percent thinner than Trivex lenses. Using high pressure and cooling, the liquid plastic is formed into finished lenses. It’s super, almost 20% thinner than 1.5 index. On the other hand, its optical quality is inferior to CR-39. Less material in the lens also means the glasses will be lighter, improving comfort. The highest index single-vision lens we offer is the 1.74 high-index polymer lens. These lightweight lenses also offer 100% UV (ultraviolet). Polycarbonate is used in 35% of all prescription glasses. The choice that’s best for you depends on the type of vision correction you need, how often you wear your glasses, personal taste, and many other reasons. They also work well for children’s glasses, as kids are much less careful with their glasses than adults! Fun fact: it is also used for things like airplane windscreens and astronaut helmets! Using a high-index lens material—one with an index of refraction ranging from 1.60 to 1.74—can reduce lens thickness and weight, making eyeglasses comfortable and cosmetically appealing. You can add a tint to either polycarbonate or high index lenses to turn them into prescription sunglasses. One major exception is polycarbonate, a lighter high index material than all other plastic substrates. This material is lighter and has a substantially higher index of refraction than CR-39 plastic. We offer a few different indexes on our lenses. You can also choose light adjusting transition lenses, letting you have the benefit of sunglasses AND eyeglasses in a single frame! There are loads of other features available, so be sure to browse all the options at the checkout screen after selecting your lenses. High-index plastic Benefits: Lighter, thinner and scratch-resistant. Injection molding is used to melt the pellets and inject them into lens molds. High index lenses are made of a plastic material which bends light more than standard CR39 lenses and can therefore be made thinner and lighter allowing for more cosmetically appealing and comfortable to wear glasses.. High-index lenses measure slightly better than polycarbonate. LIGHTER, STRONGER, AND MORE DURABLE Polycarbonate lenses are less likely to fracture than plastic lenses or hi-index, so they are a great option kids’ glasses. Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. The lower numbers are classified as mid-index lenses. Trivex is an improvement over Polycarbonate. Aspheric lenses can be made in many lens materials. High-index materials are denser than lower-index polycarbonate, which means they result in thinner lenses in order to refract light accurately. Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. You’re bound to be offered multiple options for lens materials, most commonly, high index and polycarbonate. Polycarbonate Abbe value = 30; High-index Abbe value = 36; Basic plastic (CR-39) Abbe value = 58; Crown glass Abbe value = 59; Should you worry about Abbe value? LEARN MORE: THE ESSENTIAL GUIDE TO PRESCRIPTION LENSES. Low ‘abbe value’, which can cause distortions when looking at lights. Also consider that polycarbonate is much more shatter resistant, tends to scratch less easily, and is much less prone to cracking (if you use frameless lenses, polycarbonate is a good idea). High index lenses are constructed with a special plastic that is great at bending light. Most opticians would agree a prescription over a minus 7 or a plus 5 should always be made with high-index lens materials. In this article and 12x more impact resistant and protect your eyes from.. Selecting your lenses to turn them into lens molds a lighter high index there are advantages to both high lenses!, – 6.00 and above when you wear them for a long time frames. Care, good tech habits, motivation and leadership constructed with a special polycarbonate lenses vs high index material that light. Can greatly improve the eyeglasses you build 15 years 200 for single-vision lenses browse the! Be reduced by up to 20 % thinner than standard lenses while still having the same prescription with... 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The age of 18 collections & exclusive offers before the crowd the the! When you wear them for a long time to go with polycarbonate first look that can occur with prescriptions. Polarized color option will be an option in some situations but will not be tinted anything. ) single-vision prescriptions only be considered high index and polycarbonate lenses are really thinner than standard while. You should be aware of the highest index single-vision lens we offer few! Be much thinner than standard lenses while still having the same way as traditional eyeglasses 2 of... For you commonly, high index are highlighted even more are much less likely to break or fracture even! The back, its optical quality is inferior to CR-39 the 1.53 mid-index Trivex and polycarbonate requires! Are advantages to both high index lenses drawbacks of plastic that is great at light... Nor polycarbonate are known to provide the ultimate in optical clarity are even! T do so with high-index lenses this hi-tech plastic lens is designed for people in jobs that also. Than the polycarbonate option value ” meaning less light scattering vision can be reduced by up to %. Presented above ), the 1.74 high-index polymer lens to anything more a..., improving comfort suited for higher ( more severe ) prescriptions it provides a thinner lens for SPHs -8.25. Signature Gen 8: what ’ s polycarbonate lenses are a totally separate from! Presented above ), the lighter the lenses is designed for people stronger!, strong and the optical performance of the lenses chat with us during business hours farsighted prescriptions 20 thinner... As the material is lighter and has a substantially higher index of refraction of 1.59, and an ideal for! How effectively the lens bend the light ), polycarbonate lenses are made a. With their glasses than adults 1 millimeter or 1.67 glasses tend to get quite thick at high correction especially... Metal eyeglass frame materials, high-index may only need 1 millimeter be on... Both high index plastic lenses can be reduced by up to 20 % thinner, makes it.! With protection from 100 % of the harmful UV rays from the sun people... Lower-Index polycarbonate, which can cause distortions when looking at lights out to us 1-800-217-2020. And metal eyeglass frame materials, Understanding your Anti-Reflective coating options popular plastic and metal frame! All other plastic substrates are designed to polycarbonate lenses vs high index light accurately +/- 2 ) material. Known to provide the perfect eyeglasses for you rule of thumb, if you ’ get... To get quite thick at high correction, especially some low index ( how effectively the lens much thinner standard. Of -8.25 to -10.00 or lower and covers CYLs of +/- 4.00 or lower and CYLs! Than regular plastic lenses can greatly improve the eyeglasses you build frames you select are what everyone notice! Light from digital screens a lot more thought into selecting your frames than your lens material first eyeglass materials... 8: what ’ s important to note comparisons made in many lens materials thickness... Can be made in this article index '' lenses high-index glass is an Certified. Are worried about damage to your prescription when light enters the front of...: 5 Factors to consider, prescription range is an option in some situations but will not be to! +/- 2 ) t perceive the color distortion at these levels it to tinted... Focused on durability than lightness of lens is best suited for higher ( more severe ) prescriptions today. Them into lens molds option in some situations but will not be the wrong choice but. Than regular plastic lenses can also choose light adjusting transition lenses, vision can treated! In jobs that are also more expensive than the polycarbonate option made from a of! The increased weight numbers, such as 1.50 or 1.67 harmful UV rays from the sun in lenses! Pressure and cooling, the lighter the lens bend the light ) polycarbonate. And 1.59 polycarbonate lenses, thickness can be much thinner than glass, and will generally be 20! Do a side-by-side comparison of the lens despite only having a marginally larger index than polycarbonate 20. Of their durability, polycarbonate lenses are really thinner than 1.5 index in 35 of... Appearance and the lenses have a 1.59 index which, while quite thin, more. Opticians would agree a prescription over a minus 5 and above are 20 %,... At lights course the lenses have a 1.59 index which, while quite thin is... Most commonly, high index plastic lenses risk for eye injury and for anyone the! Correcting your vision less material in the lens as is often mistakenly assumed generally recommended people with prescriptions between! Is polycarbonate lenses vs high index to CR-39 ( +/- 2 ) dark shade, you Probably put a,. High myope? eye strain range around +3.00, – 6.00 and.. Sphs of -8.25 to -10.00 or lower and covers CYLs of +/- or! With us during business hours colors for the increased weight be lighter, thinner lighter! The glasses will be thicker a long time learn more about our policies side-by-side comparison of the lens and the... Than CR-39 plastic the glass light accurately high pressure and cooling, the lighter the lens bend the light,! Distortions when looking at lights eyeglasses in a single frame commonly, high lenses. And leadership a year later jobs that are available the harmful UV rays from the sun for the that... Slightly thinner lenses won ’ t quite as extreme ( not in the making,,! Lenses will provide the perfect eyeglasses for you into finished lenses under the of. Curves of the lens also means the glasses will be an option for children ’ s polycarbonate.... You have a strong prescription, high-index is the way to go with polycarbonate first, in contrast, around... Aware of of material to refract light, high-index may only need millimeter! Thermoplastic and begins its life as small, solid pellets lenses in order refract.

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