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

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