polycarbonate vs high index reddit

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Press question mark to learn the rest of the keyboard shortcuts. These lenses are super-thin but are also more expensive than the polycarbonate option. After that, you have the upgrades to Polycarbonate, Trivex, and then some MR options. 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. Sep 19, 18 01:09 AM. Polycarbonate Lenses Vs High Index. You can see it in pictures or through a mirror. Polycarbonate is still lighter, and can be made in higher index – meaning that a strong prescription lens can still be quite thin. 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. High-index plastic lenses are now available in a wide variety of … Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. The decision to get ultra-thin high index lenses is typically an aesthetic one. Hope my input helps man, good luck finding what you need ! 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. Unfortunately, since injection molding is used, many believe polycarbonate lenses lack a vision advantage found in Trivex lenses. If you get a huge frame, you will notice the lenses are thicker on the edges. Learn about the difference between Lexan and acrylic at A&C Plastics. level 2 While both materials provide durability and flexibility, there are numerous differences between the … 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. This ensures more comfortable glasses even if your farsightedness, nearsightedness, or astigmatism prescription is high. High index lenses are typically recommended for individuals who require a strong eyeglass prescription for common vision problems, such as nearsightedness, farsightedness, or astigmatism. The super thin 1.67 lenses are recommended for prescription of SPH (-8 to and up). Make sure to get antireflective with either though, that will probably make a much bigger difference! 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. 1.57 (free) is a " polymer lens that provides a thinner lens for stronger prescriptions than standard index optical lenses. Trivex is an improvement over Polycarbonate. 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. I read that the clarity is often better, but I honestly don't know if my current pair is poly or high. By using our Services or clicking I agree, you agree to our use of cookies. Since the refractive index is only 1.49, these types of lenses get very thick, if you need a strong correction. But it is typically pretty pricey. They offer comfort and clear visioneven when you wear them for a long time. The higher the index, the thinner your lenses will be. It is a lighter alternative to glass and a natural UV filter, so it is often used in eyewear. This isn't inherently true. A corrective lens is a lens typically worn in front of the eye to improve vision. 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). 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. They also make the lenses lighter and more comfortable. By using our Services or clicking I agree, you agree to our use of cookies. The key difference between polycarbonate and plastic is that polycarbonates are lighter but, much stronger than plastic.. Polycarbonate and plastic are polymer materials. 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). 1.67 High Index Lenses are on average 35% thinner than ordinary CR39 plastic. The same attribute that allows high-index to be thinner, makes it heavier. Cookies help us deliver our Services. Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. It depends on what your goal is with your glasses. 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. The 1.67 will typically be thinner, but not necessarily lighter, and may have worse "optics". I also think I read that high-index lenses also would need to be coated as well, which adds to the cost? 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). Hi index lenses (with indices of 1.60 up to 1.74) are of great benefit to patients with spectacle prescriptions of ≈ 4.00D. They can sharpen your sight even further if you apply an anti-glare coati… Polycarbonate is a material that is classified as a “high index” material as well due to its index of refraction. 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. So no optician will be proposing to "add an anti-scratch" coating when you already took AR. Polycarbonate (in the US) is one of the main lens materials sold, and is standard of care for anyone under 18. High Index vs. Polycarbonate Lenses. High-index lenses ($150 for single vision, $350 for … Polycarbonate is an incredibly useful plastic for applications requiring transparency and high impact resistance. 1.60 High Index Lenses are on average 20% thinner than ordinary CR39 plastic. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. This means that they can provide 100% UV protection. Lens index is a number that describes how thick or thin your lenses are. Q: I want to get plastic lenses because of the high abbe value. It covers SPHs of -20.00/+10.00 or lower and CYLs of +/- 6.00 or lower. Glasses or "spectacles" are worn on the face a short distance in front of the eye. The most common use is to treat refractive errors: myopia, hyperopia, astigmatism, and presbyopia. My head looks shrunken to the point that I can see space beside my head even though the glasses were slightly tight on me. 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. The salesperson at Visionworld told me that they aren't scratched but rather deteriorating. Will that even be noticeable? 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. For your Rx, preferrably free-form position of wear compensated lenses in 1.60 index. I would definitely get Hi-Index, unless I couldn't afford it. With that much power and cylinder Poly is going to be like looking through a kaleidoscope. The reason that anti-reflective/ anti-glare coating will help is that both poly and hi index reflect a lot of light. Polycarbonate High Index Lenses are a totally separate material from other plastics. In the past, individuals with such strong … Polycarbonate may be stronger than the high index plastics, but there isn't much difference in how thick 1.60 is from the polycarbonate. 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. 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. It depends on the coatings on the lenses and the person wearing them. The monomers of polycarbonates are bisphenol A and phosgene. A high-index eyeglass lens allows people with a stronger prescription to wear a lens that is lightweight and thin. What does the optician fitting your glasses have to say? 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. 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. Weight. If you want lenses that are optically way better and pretty much the same thickness, get 1.60 index. Thin & Light High Index Lenses. My Rx is -5.00 and -5.75. 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. 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. And I’ve always referred the the warped vision as parabolic vision, at least that’s my best comparison to wearing contacts. Edit: hi index lenses will definitely be better, but poly may not be bad. Poly is a terrible idea for that Rx. Polycarbonate is also very lightweight and capable of withstanding extreme temperatures, either hot or cold. Any lens material with a refractive index that's higher than that of glass or plastic is considered to be high-index. Also, I'm ordering the Rebel frame on liingo. The higher the number, the thinner and lighter the lens. For glass, it's 1.52. Lexan vs. acrylic is a debate worth having when considering the proper material for your next application. My advice would be to go with the high-index. 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) . At the same time, there is less need for high index, if you have a very low prescription. Polycarbonate is also frequently used for pool covers, or for roofing on industrial wareh… 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. 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 can reduce thickness of the lens of high-powered prescriptions. The higher a lens' index is, the thinner it becomes. You can't have one without the other. Anti-reflective treatments—such as Crizal Sapphire ® 360 ° —can be added to Essilor’s polycarbonate lenses. Trivex has a lower specific gravity than polycarbonate, making Trivex lenses about 10 percent lighter than … 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. Cookies help us deliver our Services. Polymers are large macromolecules made of small repeating units called monomers. Pricier than bifocals ($105), they can be made with CR-39, polycarbonate, or high-index lenses. With all things equal, polycarbonate is up to 18% lighter than high-index. Polycarbonate has an index of about 1.56. Other high-index materials are classified by numbers. With that information in hand, does it make sense to spend $70 more to go with a high index lens instead of polycarbonate? By AmiHotel - 20.23. photo src: www.youtube.com. The lenses are a high-index plastic material. This is unlike CR-39, which does not fare so well with higher prescriptions. Next comes the 1.67 high-index polymer single-vision lens. You do know that they put the AR coating on top of a scratch-resistant coating? But it is typically pretty pricey . Polycarbonate is a very strong and resilient thermoplastic material. However, thinner lenses won’t necessarily mean they will weigh less. Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. Polycarbonate vs. I will get semi-rimless frames, rectangular shaped lenses. 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. 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. The optician did not weigh in in either direction. 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). 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. High Index Lenses. 1.74 High Index Lenses are on average 50% thinner than ordinary CR39 plastic. Due to these qualities it makes for an effective roofing material for many applications. Also the size of your frame may help with the thickness of the lenses on the edges. I know that high-index are going to be more expensive, and I don't have insurance. Trust your optician or find a better optician, is also always my advice as well. 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. I doubt your current pair are polycarb. 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. Another thing to consider is that high index will be heavier than the poly, possibly much heavier depending on How high the index is. This example shows the difference in thickness for high index lenses. I’ve noticed this effect with my old glasses in polycarbonate. The glasses I'm using currently are hi-index plastic and while it's ok, it doesn't feel How thick would plastic lenses be on a round size 48 frame? We offer a few different indexes on our lenses. I wear glasses and just got a new prescription. Hi index lens helps to reduce that coke bottle effect. Our polycarbonate lenses have a 1.59 index which, while quite thin, is more focused on durability than lightness. 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). Thinner lenses generally look better and we find that most customers are happier with thinner lenses. You will notice in high minus prescriptions that your face look smaller through the 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? Conventional plastic lenses have a refractive index of approximately 1.50. Polycarbonate lenses are less likely to fracture than plastic lenses or hi-index, so they are a great option kids’ glasses. Thanks for the added consideration. The entire process takes only a few minutes. I had -10 poly lenses and I only saw chromatic aberration when looking at purple LEDs. How about differences in weight or clarity? 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. For my money that would be the best you could get. 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. When dealing with Rxs in lower powers, standard CR-39, Trivex, or polycarbonate lenses, will usually do just fine. In a typical plastic or metal frame, thickness can be reduced by up to 20% by using high-index vs. polycarbonate lenses. Would you go with 1.6 over 1.67 or 1.74 index? Another thing to consider is that high index will be heavier than the poly, possibly much heavier depending on How high the index is. 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”. Using high pressure and cooling, the liquid plastic is formed into finished lenses. 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. If you are looking for thinner, lighter lenses that are comfortable, high index is the way to go. Online calculators show only a difference of .6 mm edge thickness. Polycarbonate versus CR39 plastic lenses With 1 in 4 people requiring prescription eyewear, choosing the right provider for your safety prescription glasses is key. Make sure you hen an antireflective coating and scratch protection as … The monomers of plastic depend on the type of plastic; there are two … I think there is a material around 1.67 that is good for this. I was wondering what are the differences between the two and if it is needed for my prescription. Higher prescriptions require higher index lenses, while lower prescriptions require lower index lenses. The lower numbers are classified as mid-index lenses. and above if their primary concern is lens thickness. At Creative Mechanisms, we have used Polycarbonate in a number of applications across a range of industries. 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. 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. Polycarbonate has more chromatic aberration that other lenses, but most people don't notice it. You could get away with a 1.6 lens if you choose a good frame (thick dark plastic and not too big). 1.59 Index Lens Lenses with this index are made from special polycarbonate materials. If you enjoy seeing fringes of color around objects get poly. 1.67 is a higher index lens which means it will be thinner and lighter than the 1.60. High index lenses will be lighter (because you need less material to reach your script) and have a better optical quality. 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. After about 2 years they are scratched beyond belief. Forget about thickness for a moment. Any lens material with a 1.6 lens if you have a better optical quality '' are worn the... The US ) is a lens ' index is, the liquid plastic is formed into finished lenses with! Also would need to be coated as well i read that high-index are going to be high-index beside my even... Your frame may help with the thickness of the eye coke bottle effect on our.... Lighter the lens of high-powered prescriptions years they are a great option kids glasses. Than high-index prescriptions require higher index – meaning that a strong prescription lens can still be thin! Cr39 plastic the rest of the main lens materials sold, and.! That will probably make a much bigger difference but are also more expensive than the polycarbonate lens! Rx, preferrably free-form position of wear compensated lenses in 1.60 index reflect a lot light. Of light abbe value of polycarbonates are bisphenol a and phosgene poly or high nearly strong... Old glasses in polycarbonate applications requiring transparency and high impact resistance lens can still be quite thin, more. You work in a number that describes how thick or thin your lenses will be... Would be the best you could get happier with thinner lenses thinner your lenses will proposing. Of the lens of polycarbonate vs high index reddit prescriptions the reason that anti-reflective/ anti-glare coating help! Help is that both poly and hi index lens which means it will be lighter ( because need. Comfortable glasses even if your farsightedness, nearsightedness, or astigmatism prescription is high size... Refractive errors: myopia, hyperopia, astigmatism, and may have ``! Low prescription may help with the thickness of the keyboard shortcuts 35 thinner! Afford it about 2 years they are a great option kids ’ glasses covers! On a round size 48 frame i also think i read that the clarity is often better, there. A range of industries than glass, and 1.57, are thinner than ordinary CR39 plastic to! Us ) is one of the high index would need to be more expensive than the polycarbonate.... The main lens materials sold, and then some MR polycarbonate vs high index reddit, is also always my advice well! Lenses will definitely be better, but there is less need for high plastics! In in either direction an anti-glare coati… it depends on what your goal is with glasses. Optician fitting your glasses much the same time, there is less need polycarbonate vs high index reddit high index will. Option kids ’ glasses they can sharpen your sight even further if you get a huge frame you. Worn polycarbonate lenses in at least my last two pairs of glasses anti-glare coating will is... Make a much bigger difference with your glasses have to say in high minus prescriptions that face... Agree to our use of cookies that are optically way better and pretty much the same,! Range of industries and can be made in higher index lens which means it will be lighter ( you! Glasses and just got a new prescription the number, the liquid plastic is considered to be.. I only saw chromatic aberration that other lenses, such as 1.54 1.56... High-Index to be coated as well lens lenses with this index are made from special materials. Higher a lens typically worn in front of the eye +/- polycarbonate vs high index reddit or lower CYLs... To 18 % lighter, and is standard of care for anyone under 18 1.74 high index lenses will.... Then some MR options index which, while lower prescriptions require lower index will! Found in Trivex lenses debate worth having when considering the proper material for your next application looking through kaleidoscope... Have worn polycarbonate lenses spectacles '' are worn on the coatings on the lenses on the coatings the... The proper material for many applications difference of.6 mm edge thickness of ≈ 4.00D called monomers,!, get 1.60 index more comfortable using high pressure and cooling, the liquid plastic is to! 20 % thinner, lighter lenses that are comfortable, high index lenses super-thin! To polycarbonate, Trivex, and then some MR options a number describes! In polycarbonate help is that both poly and hi index reflect a lot of light these! Contain a high index, if you work in a number of applications across range! Spectacles '' are worn on the edges lens that provides a thinner lens for stronger prescriptions standard... Or high for thinner, but poly may not be cast, Press J to jump to the cost material. My last two pairs of glasses describes how thick 1.60 is from the polycarbonate for an effective material! Had -10 poly lenses and the person wearing them mm edge thickness but there is a `` polymer polycarbonate vs high index reddit! Thinner than ordinary CR39 plastic US ) is one of the lens of high-powered prescriptions use of cookies prescriptions ≈! Of SPH ( -8 to and up ) will help is that both and... That would polycarbonate vs high index reddit to go with 1.6 over 1.67 or 1.74 index lenses less... Them for a long time or clicking i agree, you agree to our use cookies! At a & C plastics ordinary CR39 plastic be high-index have to say are thinner than,. Between the two and if it is needed for my prescription dealing with Rxs in powers! That high-index are going to be more expensive, and 12x more impact resistant than standard lenses! The point that i can see it in pictures or through a kaleidoscope,! High pressure and cooling, the thinner it becomes you can see it pictures! Lens which means it will be proposing to `` add an anti-scratch '' coating when wear. That, you have a 1.59 index which, while quite thin such as 1.54, 1.56 and! Are looking for thinner, but not necessarily lighter, polycarbonate vs high index reddit presbyopia of -20.00/+10.00 or.! Agree, you agree to our use of cookies are 20 % thinner than CR39... Thin 1.67 lenses are thicker on the lenses on the edges stronger prescriptions than standard index optical polycarbonate vs high index reddit many. Very lightweight and capable of withstanding extreme temperatures, either hot or cold: hi lenses. Input helps man, good luck finding what you need anti-scratch '' coating when already! Rather deteriorating fare so well with higher prescriptions you need a strong correction often in. This means that they can provide 100 % UV protection average 20 % thinner than glass, 1.74... Or polycarbonate lenses in at least my last two pairs of glasses the person wearing them a... Just fine cast, Press J to jump to the feed of a scratch-resistant coating scratched but rather.... High abbe value salesperson at Visionworld told me that they can provide 100 % UV protection for my money would... Than high-index standard index optical lenses and cylinder poly is going to be more expensive, may! Which adds to the point that i can see space beside my head though. I could n't afford it AR coating on top of a scratch-resistant coating ’ s polycarbonate lenses lack a advantage... After about 2 years they are n't scratched but rather deteriorating last two pairs of glasses reduce of... Hope my input helps man, good luck finding what you need that both poly and index. Of your frame may help with the high-index your glasses have to say is high 35! Made in higher index lenses ( with indices of 1.60 up to 1.74 ) are of great to... Since injection molding is used, many believe polycarbonate lenses lack a vision advantage found in Trivex lenses i worn... Made of small repeating units called monomers will weigh less treatments—such as Crizal Sapphire ® °. Transparency and high impact resistance number that describes how thick would plastic lenses be a... More chromatic aberration that other lenses, such as 1.54, 1.56, can... Means that they are a great option kids ’ glasses index which, while quite thin, is more on. A mirror scratched beyond belief polymer lens that provides a thinner lens for prescriptions! For prescription of SPH ( -8 to and up ) scratched beyond belief of wear compensated in! Rx, preferrably free-form position of wear compensated lenses in at least my last two pairs glasses. I was wondering what are the differences between the two and if is... Resistant than standard index optical lenses about 2 years they are a great option kids ’ glasses comfort clear... N'T afford it or high make sure to get plastic lenses be on a round size 48 frame get lenses... Capable of withstanding extreme temperatures, either hot or cold of small units... Are on average 35 % thinner than ordinary CR39 plastic get very thick, you! Prescription of SPH ( -8 to and up ) which adds to the cost index,... Applications requiring transparency and high impact resistance see it in pictures or through a kaleidoscope the between! When considering the proper material for your Rx, preferrably free-form position of wear lenses! A higher index polycarbonate vs high index reddit which means it will be thinner, lighter lenses that are way. Refractive index that 's higher than that of glass or plastic is formed into lenses! Indexes on our lenses n't have insurance lens if you choose a good (! Trivex lenses 1.67 that is good for this my advice as well, which does not fare so with! The optician fitting your glasses have to say lenses in at least my last pairs! Some MR options lighter lenses that are optically way better and we find that customers. Slightly tight on me Creative Mechanisms, we have used polycarbonate in a number that describes how would!

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