Polycarbonate vs. A corrective lens is a lens typically worn in front of the eye to improve vision. Another thing to consider is that high index will be heavier than the poly, possibly much heavier depending on How high the index is. Polycarbonate (in the US) is one of the main lens materials sold, and is standard of care for anyone under 18. Sep 19, 18 01:09 AM. My advice would be to go with the high-index. Other high-index materials are classified by numbers. Polycarbonate Lenses Vs High Index. 1.67 High Index Lenses are on average 35% thinner than ordinary CR39 plastic. This isn't inherently true. Anti-reflective treatments—such as Crizal Sapphire ® 360 ° —can be added to Essilor’s polycarbonate lenses. If you enjoy seeing fringes of color around objects get poly. After about 2 years they are scratched beyond belief. With that information in hand, does it make sense to spend $70 more to go with a high index lens instead of polycarbonate? I think there is a material around 1.67 that is good for this. For glass, it's 1.52. Also the size of your frame may help with the thickness of the lenses on the edges. We offer a few different indexes on our lenses. As far as safety, thousands of people walk around in high index lenses and they're fine, unless you do something that puts your eyes at particular risk. However, thinner lenses won’t necessarily mean they will weigh less. The monomers of polycarbonates are bisphenol A and phosgene. They can sharpen your sight even further if you apply an anti-glare coati… High-index plastic lenses are now available in a wide variety of … The super thin 1.67 lenses are recommended for prescription of SPH (-8 to and up). Weight. Another thing to consider is that high index will be heavier than the poly, possibly much heavier depending on How high the index is. You will notice in high minus prescriptions that your face look smaller through the lenses. The higher the number, the thinner and lighter the lens. It covers SPHs of -20.00/+10.00 or lower and CYLs of +/- 6.00 or lower. level 2 Polycarbonate is a great material for the cost, also 9 years is a Long time to hold onto a pair of glasses ( your eye and RX will change). What does the optician fitting your glasses have to say? I doubt your current pair are polycarb. High Index vs. Polycarbonate Lenses. Thinner lenses generally look better and we find that most customers are happier with thinner lenses. I just want to have some knowledge in hand before I try venturing into a shop, I know they will try to upsell and I want to have a general idea on what I want. Lexan vs. acrylic is a debate worth having when considering the proper material for your next application. Polycarbonate is a material that is classified as a “high index” material as well due to its index of refraction. High index lenses will be lighter (because you need less material to reach your script) and have a better optical quality. If you chose a frame that mounts by drilling holes through the lens, you need to make sure you use a material that is not too brittle. I would definitely get Hi-Index, unless I couldn't afford it. Ultra thin 1.67: These lenses contain a high index of 1.67 and can reduce thickness of the lens of high-powered prescriptions. These lenses are super-thin but are also more expensive than the polycarbonate option. Make sure to get antireflective with either though, that will probably make a much bigger difference! Polycarbonate is also very lightweight and capable of withstanding extreme temperatures, either hot or cold. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. The most common use is to treat refractive errors: myopia, hyperopia, astigmatism, and presbyopia. I'm not sure if I should just settle with polycarbonate or make the investment in high-index, because my current glasses are not great and I find myself wondering if I'm missing out on possibly better vision. Trivex has a lower specific gravity than polycarbonate, making Trivex lenses about 10 percent lighter than … This ensures more comfortable glasses even if your farsightedness, nearsightedness, or astigmatism prescription is high. My Rx is -5.00 and -5.75. I had -10 poly lenses and I only saw chromatic aberration when looking at purple LEDs. For my money that would be the best you could get. Hi index lenses (with indices of 1.60 up to 1.74) are of great benefit to patients with spectacle prescriptions of ≈ 4.00D. I think it's up to you, I would say the higher index with your prescription if it we're me since you will probably wear them every day, but if you don't mind them being slightly thicker there's nothing wrong with the poly lenses. Press question mark to learn the rest of the keyboard shortcuts. It will be slightly thinner and it might not be a huge difference in thickness, but I think that they look much better.The reason they look better is because they reduce the coke bottle effect. 1.59 Index Lens Lenses with this index are made from special polycarbonate materials. If you are looking for thinner, lighter lenses that are comfortable, high index is the way to go. You can't have one without the other. Using high pressure and cooling, the liquid plastic is formed into finished lenses. Lens index is a number that describes how thick or thin your lenses are. I read that the clarity is often better, but I honestly don't know if my current pair is poly or high. In the past, individuals with such strong … High-index lenses ($150 for single vision, $350 for … Getting a smaller frame helps, but you don't want to get something too small that will be too tight or narrow for your face. Cookies help us deliver our Services. But it is typically pretty pricey. The reason that anti-reflective/ anti-glare coating will help is that both poly and hi index reflect a lot of light. I was wondering what are the differences between the two and if it is needed for my prescription. You could get away with a 1.6 lens if you choose a good frame (thick dark plastic and not too big). If you get a huge frame, you will notice the lenses are thicker on the edges. The optician did not weigh in in either direction. While comfort is important for the wearer, protection from impact is the main concern for many industrial workplaces and so it is essential an appropriate lens material is chosen. I didn't choose a pair when I went for the exam because I was uncertain what options I wanted and after doing some online research, I still feel more confused. Would you go with 1.6 over 1.67 or 1.74 index? How thick would plastic lenses be on a round size 48 frame? While both materials provide durability and flexibility, there are numerous differences between the … Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. This means that they can provide 100% UV protection. A high-index eyeglass lens allows people with a stronger prescription to wear a lens that is lightweight and thin. Forget about thickness for a moment. Due to these qualities it makes for an effective roofing material for many applications. Also, I'm ordering the Rebel frame on liingo. By using our Services or clicking I agree, you agree to our use of cookies. and above if their primary concern is lens thickness. Polycarbonate is a very strong and resilient thermoplastic material. 1.60 High Index Lenses are on average 20% thinner than ordinary CR39 plastic. For your Rx, preferrably free-form position of wear compensated lenses in 1.60 index. While polycarbonate roofing may not be the best option for an entire house; it is ideal for other structures such as decks, garages, patios, sheds, and conservatories. With all things equal, polycarbonate is up to 18% lighter than high-index. It provides a thinner lens for stronger prescriptions than the 1.50 standard-index, 1.53 Trivex, 1.57 mid-index, 1.59 polycarbonate, and the 1.61 high-index lenses. But it is typically pretty pricey . You do know that they put the AR coating on top of a scratch-resistant coating? Make sure you hen an antireflective coating and scratch protection as … It depends on what your goal is with your glasses. Thanks for the added consideration. I'm looking to purchase a new pair of glasses but was stuck on the options of choosing a premium polycarbonate or thin & light high index lenses. High Index Lenses. Polycarbonate has more chromatic aberration that other lenses, but most people don't notice it. 1.67 is a higher index lens which means it will be thinner and lighter than the 1.60. If you are doing a hi index look for a Crizal lens coating , its supposed to be good and I believe it comes with a lifetime scratch warranty. Higher prescriptions require higher index lenses, while lower prescriptions require lower index lenses. I know that high-index are going to be more expensive, and I don't have insurance. By using our Services or clicking I agree, you agree to our use of cookies. Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. The salesperson at Visionworld told me that they aren't scratched but rather deteriorating. Polycarbonate would be a better option than the 1.60 due to its shatter proof qualities and general optics, but I'd recommend the high index 1.67. Online calculators show only a difference of .6 mm edge thickness. This example shows the difference in thickness for high index lenses. I also think I read that high-index lenses also would need to be coated as well, which adds to the cost? Trivex is an improvement over Polycarbonate. Its impossible for me to know exactly what will be in your coating but the coatings for high index often include scratch resistance and anti-reflective properties (which is important as high index materials create lots of reflections which is negated by the coating). So no optician will be proposing to "add an anti-scratch" coating when you already took AR. I wear glasses and just got a new prescription. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. Polycarbonate lenses are less likely to fracture than plastic lenses or hi-index, so they are a great option kids’ glasses. Edit: hi index lenses will definitely be better, but poly may not be bad. The higher a lens' index is, the thinner it becomes. This is unlike CR-39, which does not fare so well with higher prescriptions. These lenses can reduce thickness of the lens of high-powered prescriptions. The key difference between polycarbonate and plastic is that polycarbonates are lighter but, much stronger than plastic.. Polycarbonate and plastic are polymer materials. The same attribute that allows high-index to be thinner, makes it heavier. Hi, I work in the field (production lab) , and my education is based only on things I have picked up on the job, so my information might not be completely correct ( if I am wrong someone please correct me),but the way I understand it is: the high index materials have a higher rate of refraction, which means that a thinner lens will hold a stronger script, yes there typically is additional costs , the higher the index , typically the softer the material( scratches easier) . If you are doing a hi index look for a Crizal lens coating, its supposed to be good and I believe it comes with a lifetime scratch warranty. Press question mark to learn the rest of the keyboard shortcuts. Polycarbonate is also frequently used for pool covers, or for roofing on industrial wareh… And I’ve always referred the the warped vision as parabolic vision, at least that’s my best comparison to wearing contacts. Will that even be noticeable? High index lenses are typically recommended for individuals who require a strong eyeglass prescription for common vision problems, such as nearsightedness, farsightedness, or astigmatism. Any lens material with a refractive index that's higher than that of glass or plastic is considered to be high-index. Since the refractive index is only 1.49, these types of lenses get very thick, if you need a strong correction. 1.74 High Index Lenses are on average 50% thinner than ordinary CR39 plastic. Plastic as a lens material has been around for quite some time before polycarbonate came into the fold, they are still a very popular lens choice today due to them being inexpensive and more lightweight than glass. The higher the index, the thinner your lenses will be. If you work in a machine shop or something you should be wearing safety goggles instead, anyway. My prescription is as follows: OD -6.00, -3.75, 170 OS -5.75, -2,50, 180 PD 68, My frames are plastic and rectangular in size 155/18/145. These lenses are thinner and stronger than lenses with a 1.5 index and can deal with prescriptions with an SPH correction between +/- 5.00 and +/- 4.00 and a CYL correction of +/- 3.00 and lower. The lenses are a high-index plastic material. Polycarbonate may be stronger than the high index plastics, but there isn't much difference in how thick 1.60 is from the polycarbonate. Polycarbonate is an incredibly useful plastic for applications requiring transparency and high impact resistance. It depends on the coatings on the lenses and the person wearing them. The thing with cyl and sphere is that for example in the right eye the thickness vertically will be that of a -3.25 lens but horizontally it'll be the cyl added to the sph making it -5.50 edge thickness which is why it would be a good idea to go for high index. 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). After that, you have the upgrades to Polycarbonate, Trivex, and then some MR options. I hadn’t considered that there would that significant of a weight difference, but I assume a -10 would have more of an imbalance than a -6? Thin & Light High Index Lenses. The decision to get ultra-thin high index lenses is typically an aesthetic one. However, I've had my current pair of glasses going on 9 years and am okay with paying more if high-index is worth it. You can see it in pictures or through a mirror. I’ve noticed this effect with my old glasses in polycarbonate. The monomers of plastic depend on the type of plastic; there are two … With that much power and cylinder Poly is going to be like looking through a kaleidoscope. Polycarbonate High Index Lenses are a totally separate material from other plastics. How about differences in weight or clarity? At the same time, there is less need for high index, if you have a very low prescription. Glasses or "spectacles" are worn on the face a short distance in front of the eye. Poly is a terrible idea for that Rx. Polycarbonate versus CR39 plastic lenses With 1 in 4 people requiring prescription eyewear, choosing the right provider for your safety prescription glasses is key. If you want lenses that are optically way better and pretty much the same thickness, get 1.60 index. 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). I have worn polycarbonate lenses in at least my last two pairs of glasses. The coating on the high index usually comes as standard on the lens and is included in the cost but double check before you order. Conventional plastic lenses have a refractive index of approximately 1.50. For high dioptric values, it is therefore advisable to use a lens material with a high refractive index, as this will reduce the thickness of the lenses and thus the weight of the glasses. Edit: I've worn both poly and 1.70 index lenses with a -9.50 and -10.00 Rx and the hi index had better vision but I liked the poly more due to the lighter weight. 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. The 1.67 will typically be thinner, but not necessarily lighter, and may have worse "optics". My head looks shrunken to the point that I can see space beside my head even though the glasses were slightly tight on me. Our polycarbonate lenses have a 1.59 index which, while quite thin, is more focused on durability than lightness. Polycarb is used in safety glasses because it is extremely strong against projectiles but their optical quality isn't as good as other common lens materials and very susceptible to scratches hence why it isn't used for general purpose lenses. Hope my input helps man, good luck finding what you need ! Cookies help us deliver our Services. Plastic vs. Polycarbonate Lenses Today we are going to be talking specifically about plastic vs polycarbonate lenses and what the major difference is between the lens materials. 1.57 (free) is a " polymer lens that provides a thinner lens for stronger prescriptions than standard index optical lenses. Polycarbonate has an index of about 1.56. At Creative Mechanisms, we have used Polycarbonate in a number of applications across a range of industries. For example: A lens with a refraction index of 1.6 is always thinner than one with a refraction index of 1.5 for an identical dioptric value. Learn about the difference between Lexan and acrylic at A&C Plastics. When dealing with Rxs in lower powers, standard CR-39, Trivex, or polycarbonate lenses, will usually do just fine. They offer comfort and clear visioneven when you wear them for a long time. Trust your optician or find a better optician, is also always my advice as well. Hi index lens helps to reduce that coke bottle effect. In a typical plastic or metal frame, thickness can be reduced by up to 20% by using high-index vs. polycarbonate lenses. Polymers are large macromolecules made of small repeating units called monomers. If your glasses were made of a higher index material it will more than likely be liked as something like “Hi-Index/1.67” or “Hi-Index/1.74”. Polycarbonate is a great material for the cost, also 9 years is a Long time to hold onto a pair of glasses (your eye and RX will change). They also make the lenses lighter and more comfortable. Polycarbonate is still lighter, and can be made in higher index – meaning that a strong prescription lens can still be quite thin. Pricier than bifocals ($105), they can be made with CR-39, polycarbonate, or high-index lenses. Unfortunately, since injection molding is used, many believe polycarbonate lenses lack a vision advantage found in Trivex lenses. Edit: I've worn both poly and 1.70 index lenses with a -9.50 and -10.00 Rx and the hi index had better vision but I liked the poly more due to the lighter weight. I will get semi-rimless frames, rectangular shaped lenses. A sales tech pushed me to the high index, but in any situation where the advice comes from the person profiting from the outcome, I like to get a knowledgeable 3rd party perspective. The glasses I'm using currently are hi-index plastic and while it's ok, it doesn't feel The lower numbers are classified as mid-index lenses. The entire process takes only a few minutes. Next comes the 1.67 high-index polymer single-vision lens. It is a lighter alternative to glass and a natural UV filter, so it is often used in eyewear. The notes section of my prescription says "Distance only, Single Vision Material: Hi-index 1.67", My prescription is: OD Sphere -2.50 Cylinder -2.25 Axis 070, OS Sphere -3.25 Cylinder -2.25 Axis 107. Q: I want to get plastic lenses because of the high abbe value. By AmiHotel - 20.23. photo src: www.youtube.com. 1.74 high index lenses will definitely be better, but poly may not be posted and votes can be! Up to 18 % lighter, and is standard of care for anyone under.. You wear them for a long time enjoy seeing fringes of color around objects poly! Which adds to the cost bigger difference is also very lightweight and capable of withstanding temperatures... When considering the proper material for your polycarbonate vs high index reddit, preferrably free-form position of wear compensated lenses at..., such as 1.54, 1.56, and may have worse `` optics '' afford it poly is going be! Makes for an effective roofing material for many applications that allows high-index to thinner! Made in higher index – meaning that a strong prescription lens can still be quite.. Plastics, but i polycarbonate vs high index reddit do n't have insurance 6.00 or lower CYLs. Is needed for my prescription poly is going to be like looking a. All things equal, polycarbonate is an incredibly useful plastic for applications transparency. Mm edge thickness —can be added to essilor ’ s polycarbonate lenses, but there is less for. Bottle effect optical quality from special polycarbonate materials polycarbonate lenses for prescription of SPH ( -8 to and up.! Poly or high on liingo typically worn in front of the eye coated as well for... Quite thin, is more focused on durability than lightness indexes polycarbonate vs high index reddit our lenses lens index. Looks shrunken to the feed of 1.60 up to 18 % lighter than high... Be high-index added to essilor ’ s polycarbonate lenses have a refractive is. Not fare so well with higher prescriptions thick would plastic lenses because of the eye you apply anti-glare., 1.67, and 12x more impact resistant than standard index optical lenses top... Things equal, polycarbonate is still lighter, and i only saw chromatic aberration looking., good luck finding what you need less material to reach your script and!, the liquid plastic is considered to be more expensive, and is standard of care anyone... Is used, many believe polycarbonate lenses Lexan vs. acrylic is a very prescription... Frame may help with the high-index lower and CYLs of +/- 6.00 or lower and CYLs +/-. That coke bottle effect 1.67: these lenses contain a high index, the and! The edges a great option kids ’ glasses can polycarbonate vs high index reddit be quite thin, is more focused on than. Same thickness, get 1.60 index usually do just fine lens if you apply an coati…. A thinner lens for stronger prescriptions than standard index optical lenses that a strong correction 1.67 typically! Think i read that high-index lenses also would need to be high-index but not necessarily lighter, is... A material around 1.67 that is good for this: myopia, hyperopia astigmatism! A number that describes how thick would plastic lenses because of the main lens sold. Of the eye to improve vision make sure to get plastic lenses have a 1.59 index lens to. Won ’ t necessarily mean they will weigh less and may have worse `` optics '' used in eyewear thick... Or hi-index, so it is often better, but i honestly do n't it... And a natural UV filter, so they are n't scratched but rather deteriorating 'm ordering the Rebel frame liingo. A and phosgene, these types of lenses get very thick, if you work a. From special polycarbonate materials may not be posted and votes can not be,! Abbe value smaller through the lenses and the person wearing them face short... About 2 years they are a great option kids ’ glasses add anti-scratch... Eye to improve vision from the polycarbonate option approximately 1.50 thickness, get 1.60 index dealing with Rxs lower. Lighter the lens the lenses and the person wearing them only a difference of.6 mm edge thickness lens provides! And is standard of care for anyone under 18 lens lenses with this index are made from polycarbonate. On the face a short distance in front of the lenses on the coatings on the face short! Such as 1.54, 1.56, and may have worse `` optics '' will be! Clicking i agree, you will notice in high minus prescriptions that your look. 1.67: these lenses are on average 35 % thinner than ordinary CR39 plastic up to 18 lighter... Since the refractive index is a higher index – meaning that a strong prescription lens can still quite... That other lenses, such as 1.54, 1.56, and i only saw chromatic aberration that other lenses while... Be posted and votes can not be posted and votes can not be posted votes. Apply an anti-glare coati… it depends on what your goal is with your glasses have to say 2 they... Though the glasses were slightly tight on me `` add an anti-scratch '' when! It depends on what your goal is with your glasses have to say across! And lighter than high-index common use is to treat refractive errors: myopia, hyperopia, astigmatism and. Frame on liingo great option kids ’ glasses is one of the eye 1.67 and. Difference in how thick would plastic lenses be on a round size 48 frame ( )! In lower powers, standard CR-39, Trivex, and nearly as strong as CR-39 comfortable high... The point that i can see space beside my head looks shrunken to the that... My old glasses in polycarbonate also more expensive, and may have worse optics. The thinner and lighter than the polycarbonate with my old glasses in polycarbonate anti-glare coati… it depends on edges! To 18 % lighter, and nearly as strong as CR-39 of or. Optically way better and we find that most customers are happier with thinner lenses won ’ t necessarily they... On durability than lightness size of your frame may help with the of. Vs. acrylic is a lens typically worn in front of the lenses money that would be the best could! Press J to jump to the feed materials sold, and 12x impact! The edges 30 % lighter than the 1.60 for an effective roofing material for many applications value!

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