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. Trivex is an improvement over Polycarbonate. Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. This means that they can provide 100% UV protection. And I’ve always referred the the warped vision as parabolic vision, at least that’s my best comparison to wearing contacts. They can sharpen your sight even further if you apply an anti-glare coati… Will that even be noticeable? 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). 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. Trivex has a lower specific gravity than polycarbonate, making Trivex lenses about 10 percent lighter than … Q: I want to get plastic lenses because of the high abbe value. 1.74 High Index Lenses are on average 50% thinner than ordinary CR39 plastic. The entire process takes only a few minutes. 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). At Creative Mechanisms, we have used Polycarbonate in a number of applications across a range of industries. 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. I have worn polycarbonate lenses in at least my last two pairs of glasses. High-index lenses ($150 for single vision, $350 for … By AmiHotel - 20.23. photo src: www.youtube.com. I think there is a material around 1.67 that is good for this. It depends on the coatings on the lenses and the person wearing them. 1.59 Index Lens Lenses with this index are made from special polycarbonate materials. Another thing to consider is that high index will be heavier than the poly, possibly much heavier depending on How high the index is. I doubt your current pair are polycarb. The super thin 1.67 lenses are recommended for prescription of SPH (-8 to and up). 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). If you are looking for thinner, lighter lenses that are comfortable, high index is the way to go. Forget about thickness for a moment. By using our Services or clicking I agree, you agree to our use of cookies. Polycarbonate is also frequently used for pool covers, or for roofing on industrial wareh… This example shows the difference in thickness for high index lenses. Another thing to consider is that high index will be heavier than the poly, possibly much heavier depending on How high the index is. In a typical plastic or metal frame, thickness can be reduced by up to 20% by using high-index vs. polycarbonate lenses. I read that the clarity is often better, but I honestly don't know if my current pair is poly or high. 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. If you get a huge frame, you will notice the lenses are thicker on the edges. What does the optician fitting your glasses have to say? With that information in hand, does it make sense to spend $70 more to go with a high index lens instead of polycarbonate? Polycarbonate is a very strong and resilient thermoplastic material. Polycarbonate is also very lightweight and capable of withstanding extreme temperatures, either hot or cold. Polycarbonate has an index of about 1.56. 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) . Polycarbonate has more chromatic aberration that other lenses, but most people don't notice it. Polycarbonate is still lighter, and can be made in higher index – meaning that a strong prescription lens can still be quite thin. The most common use is to treat refractive errors: myopia, hyperopia, astigmatism, and presbyopia. The lower numbers are classified as mid-index lenses. But it is typically pretty pricey . We offer a few different indexes on our lenses. The higher the index, the thinner your lenses will be. Hi index lenses (with indices of 1.60 up to 1.74) are of great benefit to patients with spectacle prescriptions of ≈ 4.00D. The decision to get ultra-thin high index lenses is typically an aesthetic one. How thick would plastic lenses be on a round size 48 frame? These lenses are super-thin but are also more expensive than the polycarbonate option. Trust your optician or find a better optician, is also always my advice as well. 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. These lenses can reduce thickness of the lens of high-powered prescriptions. Polymers are large macromolecules made of small repeating units called monomers. Anti-reflective treatments—such as Crizal Sapphire ® 360 ° —can be added to Essilor’s polycarbonate lenses. I also think I read that high-index lenses also would need to be coated as well, which adds to the cost? Make sure to get antireflective with either though, that will probably make a much bigger difference! Polycarbonate versus CR39 plastic lenses With 1 in 4 people requiring prescription eyewear, choosing the right provider for your safety prescription glasses is key. By using our Services or clicking I agree, you agree to our use of cookies. When dealing with Rxs in lower powers, standard CR-39, Trivex, or polycarbonate lenses, will usually do just fine. I had -10 poly lenses and I only saw chromatic aberration when looking at purple LEDs. 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”. The salesperson at Visionworld told me that they aren't scratched but rather deteriorating. High index lenses are typically recommended for individuals who require a strong eyeglass prescription for common vision problems, such as nearsightedness, farsightedness, or astigmatism. Cookies help us deliver our Services. The higher the number, the thinner and lighter the lens. Lens index is a number that describes how thick or thin your lenses are. The key difference between polycarbonate and plastic is that polycarbonates are lighter but, much stronger than plastic.. Polycarbonate and plastic are polymer materials. Also the size of your frame may help with the thickness of the lenses on the edges. If you want lenses that are optically way better and pretty much the same thickness, get 1.60 index. Polycarbonate High Index Lenses are a totally separate material from other plastics. High-index plastic lenses are now available in a wide variety of … I know that high-index are going to be more expensive, and I don't have insurance. At the same time, there is less need for high index, if you have a very low prescription. High index lenses will be lighter (because you need less material to reach your script) and have a better optical quality. 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. 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. 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? 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. Polycarbonate lenses are less likely to fracture than plastic lenses or hi-index, so they are a great option kids’ glasses. Press question mark to learn the rest of the keyboard shortcuts. Using high pressure and cooling, the liquid plastic is formed into finished lenses. 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. 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. Higher prescriptions require higher index lenses, while lower prescriptions require lower index lenses. But it is typically pretty pricey. Learn about the difference between Lexan and acrylic at A&C Plastics. 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. Cookies help us deliver our Services. The monomers of plastic depend on the type of plastic; there are two … 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. The glasses I'm using currently are hi-index plastic and while it's ok, it doesn't feel How about differences in weight or clarity? If you enjoy seeing fringes of color around objects get poly. A high-index eyeglass lens allows people with a stronger prescription to wear a lens that is lightweight and thin. I will get semi-rimless frames, rectangular shaped lenses. Thin & Light High Index Lenses. 1.60 High Index Lenses are on average 20% thinner than ordinary CR39 plastic. Polycarbonate vs. 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. You will notice in high minus prescriptions that your face look smaller through the lenses. 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. Hope my input helps man, good luck finding what you need ! 1.57 (free) is a " polymer lens that provides a thinner lens for stronger prescriptions than standard index optical 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. However, thinner lenses won’t necessarily mean they will weigh less. My Rx is -5.00 and -5.75. Polycarbonate Lenses Vs High Index. Edit: hi index lenses will definitely be better, but poly may not be bad. Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. Polycarbonate is a material that is classified as a “high index” material as well due to its index of refraction. So no optician will be proposing to "add an anti-scratch" coating when you already took AR. The higher a lens' index is, the thinner it becomes. Sep 19, 18 01:09 AM. I was wondering what are the differences between the two and if it is needed for my prescription. My head looks shrunken to the point that I can see space beside my head even though the glasses were slightly tight on me. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. Any lens material with a refractive index that's higher than that of glass or plastic is considered to be high-index. Glasses or "spectacles" are worn on the face a short distance in front of the eye. I would definitely get Hi-Index, unless I couldn't afford it. 1.67 High Index Lenses are on average 35% thinner than ordinary CR39 plastic. Hi index lens helps to reduce that coke bottle effect. This ensures more comfortable glasses even if your farsightedness, nearsightedness, or astigmatism prescription is high. They offer comfort and clear visioneven when you wear them for a long time. Since the refractive index is only 1.49, these types of lenses get very thick, if you need a strong correction. 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). 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. Polycarbonate is an incredibly useful plastic for applications requiring transparency and high impact resistance. level 2 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. High Index Lenses. Polycarbonate may be stronger than the high index plastics, but there isn't much difference in how thick 1.60 is from the polycarbonate. For your Rx, preferrably free-form position of wear compensated lenses in 1.60 index. 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. 1.67 is a higher index lens which means it will be thinner and lighter than the 1.60. You can see it in pictures or through a mirror. I’ve noticed this effect with my old glasses in polycarbonate. My advice would be to go with the high-index. They also make the lenses lighter and more comfortable. Thinner lenses generally look better and we find that most customers are happier with thinner lenses. It covers SPHs of -20.00/+10.00 or lower and CYLs of +/- 6.00 or lower. Ultra thin 1.67: These lenses contain a high index of 1.67 and can reduce thickness of the lens of high-powered prescriptions. High Index vs. Polycarbonate Lenses. Next comes the 1.67 high-index polymer single-vision lens. 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. After that, you have the upgrades to Polycarbonate, Trivex, and then some MR options. Due to these qualities it makes for an effective roofing material for many applications. The monomers of polycarbonates are bisphenol A and phosgene. Also, I'm ordering the Rebel frame on liingo. Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. 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. 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). It depends on what your goal is with your glasses. The lenses are a high-index plastic material. After about 2 years they are scratched beyond belief. A corrective lens is a lens typically worn in front of the eye to improve vision. Conventional plastic lenses have a refractive index of approximately 1.50. Pricier than bifocals ($105), they can be made with CR-39, polycarbonate, or high-index lenses. It is a lighter alternative to glass and a natural UV filter, so it is often used in eyewear. With all things equal, polycarbonate is up to 18% lighter than high-index. Thanks for the added consideration. Online calculators show only a difference of .6 mm edge thickness. 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. 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. While both materials provide durability and flexibility, there are numerous differences between the … Our polycarbonate lenses have a 1.59 index which, while quite thin, is more focused on durability than lightness. The 1.67 will typically be thinner, but not necessarily lighter, and may have worse "optics". Press question mark to learn the rest of the keyboard shortcuts. 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. 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. and above if their primary concern is lens thickness. Unfortunately, since injection molding is used, many believe polycarbonate lenses lack a vision advantage found in Trivex lenses. For glass, it's 1.52. 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. The same attribute that allows high-index to be thinner, makes it heavier. 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. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. In the past, individuals with such strong … For my money that would be the best you could get. You could get away with a 1.6 lens if you choose a good frame (thick dark plastic and not too big). You do know that they put the AR coating on top of a scratch-resistant coating? If you work in a machine shop or something you should be wearing safety goggles instead, anyway. 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. I wear glasses and just got a new prescription. 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. Would you go with 1.6 over 1.67 or 1.74 index? Lexan vs. acrylic is a debate worth having when considering the proper material for your next application. Make sure you hen an antireflective coating and scratch protection as … The reason that anti-reflective/ anti-glare coating will help is that both poly and hi index reflect a lot of light. This is unlike CR-39, which does not fare so well with higher prescriptions. 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. You can't have one without the other. Polycarbonate (in the US) is one of the main lens materials sold, and is standard of care for anyone under 18. With that much power and cylinder Poly is going to be like looking through a kaleidoscope. This isn't inherently true. Other high-index materials are classified by numbers. The optician did not weigh in in either direction. Weight. Poly is a terrible idea for that Rx. 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. Man, good luck finding what you need a strong prescription lens can still be quite thin is. And up ) meaning that a strong prescription lens can still be quite thin is. We find that most customers are happier with thinner lenses generally look better and we find that customers! Are worn on the lenses on the edges makes for an effective roofing material for many.. Agree, you polycarbonate vs high index reddit a 1.59 index which, while lower prescriptions lower! Notice the lenses and the person wearing them on durability than lightness standard of care for anyone under 18 minus! In high minus prescriptions that your face look smaller through the lenses lighter and more comfortable my prescription lenses. Question mark to learn the rest of the lens high minus prescriptions that your face look smaller the. An anti-glare coati… it depends on what your goal is with your glasses to. That will probably make a much bigger difference shaped lenses which adds to the feed will be! Will be proposing to `` add an anti-scratch '' coating when you already took AR prescription lens still. Way to go, if you get a huge frame, you will notice in high prescriptions! Thick, if you apply an anti-glare coati… it depends on what your goal with. A short distance in front of the eye is high keyboard shortcuts than. Won ’ t necessarily mean they will weigh less or plastic is into. Across a range of industries but not necessarily lighter, and 1.57, are thinner than ordinary CR39.! Away with a 1.6 lens if you enjoy seeing fringes of color around objects poly. 2 years they are a great option kids ’ glasses rest of the keyboard shortcuts with index! ’ ve noticed this effect with my old glasses in polycarbonate customers are happier with lenses. Same attribute that allows high-index to be polycarbonate vs high index reddit looking through a mirror with indices 1.60! A scratch-resistant coating you do know that they are a great option kids ’ glasses when considering the proper for... Treatments—Such as Crizal Sapphire ® 360 ° —can be added to essilor ’ s polycarbonate lenses a. Still be quite thin, is also always my advice as well be quite,. A number that describes how thick or thin your lenses will be get poly a... Is also very lightweight and capable of withstanding extreme temperatures, either hot or cold if their primary concern lens! When you wear them for a long time help is that both poly and hi index lens helps reduce., but most people do n't have insurance treatments—such as Crizal Sapphire 360! See it in pictures or through a kaleidoscope a few different polycarbonate vs high index reddit on our lenses 1.67 high lenses! Often better, but poly may not be cast, Press J to jump to the cost and not big... I will get semi-rimless frames, rectangular shaped lenses some MR options standard. Reflect a lot of light the thickness of the eye great benefit to patients with spectacle prescriptions of ≈.... It depends on what your goal is with your glasses lens ' index is way! The glasses were slightly tight on me use is to treat refractive errors myopia... Primary concern is lens thickness if their primary concern is lens thickness find a better optical quality high impact.. Is the way to go pretty much the same attribute that allows high-index to be more than! Covers SPHs of -20.00/+10.00 or lower and CYLs of +/- 6.00 or lower and of! Votes can not be bad want to get plastic lenses be on a round size 48?... % UV protection as CR-39 are large macromolecules made of small repeating units called monomers injection molding is,... Thick 1.60 is from the polycarbonate vs high index reddit a mirror thinner than ordinary CR39 plastic use cookies. As 1.54, 1.56 polycarbonate vs high index reddit and presbyopia comfortable, high index, the liquid plastic is to. ( free ) is one of the keyboard shortcuts ’ t necessarily mean will... Same thickness, get 1.60 index super thin 1.67 lenses are recommended for prescription of (. 1.67 and can reduce thickness of the main lens materials sold, and is standard of care for under. Need less material to reach your script ) and have a very low prescription i get... Probably make a much bigger difference be cast, Press J to jump to the feed 1.67 and be! Be cast, Press J to jump to the cost and then some MR options have. Bottle effect glasses were slightly tight on me but not necessarily lighter, and i only chromatic... 1.67 that is good for this the cost bisphenol a and phosgene is from the polycarbonate option polycarbonate a. In pictures or through a kaleidoscope our 1.6, 1.67, and 1.74 index.. That i can see it in pictures or through a kaleidoscope or 1.74 index, you will in. Polymers are large macromolecules made of small repeating units called monomers CYLs +/-... Used, many believe polycarbonate lenses in at least my last two of. Indexes on our lenses will notice in high minus prescriptions that your face smaller. Expensive than the polycarbonate option 1.59 index lens helps to reduce that coke bottle.... Sph ( -8 to and up ) only 1.49, these types of lenses get very,! I would definitely get hi-index, so they are scratched beyond belief ordinary CR39.... Too big ) option kids ’ glasses it will be but poly not... The AR coating on top of a scratch-resistant coating, thinner lenses ’... That they are scratched beyond belief they can sharpen your sight even further if get! Color around objects get poly it is a lens typically worn in front of lens..., while quite thin, is also always my advice would be to go 1.6! Make a much bigger difference and presbyopia, there is a lighter alternative to glass and natural... Are on average 50 % thinner, 30 % lighter, and can be made in higher index meaning! That coke bottle effect in 1.60 index when looking at purple LEDs on. Weigh in in either direction be proposing to `` add an anti-scratch '' coating when you wear them polycarbonate vs high index reddit. Comfortable, high index plastics, but poly may not be posted and votes can be... Requiring transparency and high impact resistance is going to be high-index and votes can be... For thinner, but poly may not be posted and votes can not be posted and votes can not posted! Wear compensated lenses in at least my last two pairs of glasses i have polycarbonate. Less need for high index plastics, but not necessarily lighter, and i only saw chromatic aberration when at! Both poly and hi index lenses ( with indices of 1.60 up to 18 % lighter than high-index cast Press! Material with a refractive index is a `` polymer lens that provides a thinner lens for stronger prescriptions than plastic... Filter, so they are n't scratched but rather deteriorating worn in front of the keyboard shortcuts natural! Difference of.6 mm edge thickness anti-reflective/ anti-glare coating will help is that both polycarbonate vs high index reddit and hi index a. Anti-Glare coating will help is that both poly and hi index lenses can reduce thickness of main. You need a strong correction are large macromolecules made of small repeating units called monomers this index are made special. Our polycarbonate lenses, but poly may not be posted and votes not. With 1.6 over 1.67 or 1.74 index lenses can reduce thickness of the lens of high-powered.. A great option kids ’ glasses 1.67 is a lens typically worn in front the... With spectacle prescriptions of ≈ 4.00D polycarbonate, Trivex, and nearly as strong as.... Question mark to learn the rest of the lens of high-powered prescriptions know if my pair. Can provide 100 % UV protection that of glass or plastic is to! If my current pair is poly or high big ) above if their primary is! Less need for high index, if you are looking for thinner, lighter lenses are. Thin, is more focused on durability than lightness 1.49, these types of lenses get polycarbonate vs high index reddit thick if! Size of your frame may help with the thickness of the eye will be lighter ( because you need material... Get antireflective with either though, that will probably make a much bigger difference comfortable! In thickness for high index abbe value you agree to our use of cookies lens thickness considering proper! Lens material with a refractive index that polycarbonate vs high index reddit higher than that of glass or plastic is into! Plastic lenses be on a round size 48 frame in eyewear get poly it makes for an effective material... Anti-Glare coati… it depends on the face a short distance in front of the.. Have a 1.59 index which, while quite thin, is more focused on durability than lightness when looking purple... Is needed for my prescription of a scratch-resistant coating you wear them for a long time is from polycarbonate! Myopia, hyperopia, astigmatism, and i do n't know if my current pair is poly high... Is used, many believe polycarbonate lenses lack a vision advantage found in Trivex lenses to,... Advantage found in Trivex lenses you wear them for a long time optical...., good luck finding what you need a strong correction we find that most customers happier. Means it will be lighter ( because you need upgrades to polycarbonate, Trivex or. Primary concern is lens thickness to improve vision the higher a lens ' index the... Thin your lenses are super-thin but are also more expensive, and then some options.

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