They offer comfort and clear visioneven when you wear them for a long time. Glass was excellent, in that it has by far the best optical quality (you’ll never see quality photographic or telescope lenses made of any kind of plastic!). And most of all, it gets thick quickl… Your email address will not be published. Simply click here to return to. Their key benefits include lighter weights and much thinner lens construction which improves fit and clarity. If you are working at a job that requires safety glasses, it is a good idea to check with a safety officer to see what’s accepted where you work before purchasing any glasses. and can accommodate MANY kinds of vision needs, including higher prescriptions. High Index lenses are thinner, stronger, and more versatile than standard eyewear lenses.They are made from extremely durable plastic and are regarded as the best lenses you can get for your prescription glasses. We hope to be helpful for you! They can sharpen your sight even further if you apply an anti-glare coati… How? High-index eyeglass lenses are the right choice if you want thinner, lighter lenses and eyeglasses that are as attractive and comfortable as possible.. Thinner, lighter high-index lenses are especially recommended if you have a strong eyeglass prescription for nearsightedness, farsightedness or astigmatism. Hi, I'm Endre with my brother Arpi. Copyright © 2020 Perfect-Eyeglasses-Guide.Com. In terms of balancing price … It is lighter and more scratch resistant and has high-impact resistance like Polycarbonate. It's easy to do. These lenses are perfect for anyone with stronger prescriptions, but not only limited to just those individuals. It is important to consider the fact that, in a dangerous environment, it is a poor decision to trade safety for aesthetics. Q: I want to get plastic lenses because of the high abbe value. What’s more, these lenses are up to 10 times more impact-resistant than regular plastic lenses. The impact resistance is a welcome side effect. Even if you have a weaker prescription but you just want your glasses to be as light as possible, high-index lenses would work for you as well. That … Polycarbonate High Index is the most impact-resistant lens material that most labs offer, and it is not considered to be high index (though its index is higher than standard plastic). Your email address will not be published. Most high index scratch-resistant lenses are 50 percent lighter than CR-39 plastic lenses. Polycarbonated Lenses. Polycarbonate is a good choice for impact resistance if your prescription is not very high, or if you need. Save my name, email, and website in this browser for the next time I comment. If you are interested in impact resistant high index lenses, here are some useful things to know: If you are most concerned with keeping your eyes safe from impact, you should definitely purchase a pair of prescription glasses with polycarbonate lenses. They also feature natural 100 percent UV protection. Acetone is a common chemical in nail polish removers and some other solvents that may be around your house. Polycarbonate lenses are less likely to fracture than plastic lenses or hi-index, so they are a great option kids’ glasses. If you are interested in prescription safety glasses in a wraparound frame, you may not be able to get the lenses in high index plastic anyway because larger wraparound frames often have large lens pockets that will not work with many prescriptions in high index plastic. How thick would plastic lenses be on a round size 48 frame? If you are most interested in a pair of good-looking glasses that will last a long time, high index plastic is the material for you. Are High Index Lenses Also Impact Resistant? The refractive indexes of traditional plastic lenses and glass lenses are about 1.5 and 1.52 respectively. The combination of a thinner center and a brittle AR coating might drop the … Unfortunately though it is rather heavy, and also can shatter relatively easily. Trivex lenses are the new rival for polycarbonate lense; they are thin, lightweight and much more impact-resistant than regular Plastic CR-39 or Polycarbonate lenses. Essilor offers hi-index 1.67, 1.6, and 1.74 lenses that are thinner and lighter with more appealing aesthetics for greater comfort and a better look. Because they are typically processed to be as thin as possible, and because high index is a plastic that will crack when enough force is applied, many pairs of high index prescription lenses would fail an impact resistance test. The 1.53 mid-index Trivex lens is a polymer lens that is the most impact-resistant lens available. © RX Safety - Developed by ISEA Media & Cosmick Technologies. They are impact resistant, scratch resistant and UV coated. High-index lenses have an index of refraction that starts at around 1.61 and can go as high as 1.74. High index lenses are not naturally impact resistant. When a worker falls, their body harness, lifeline, self-retracting lanyard, and anchor are all subjected to a high impact. A number of plastic lens materials are thinner and lighter than CR-39 plastic, which offers even more comfort than the standard CR-30 plastic lenses. If you have the knowledge or experience that others would want, you can do the same and create a website from scratch about your hobby, using the right tools. Deciding which you should get depends on your prescription and your lifestyle. High-index plastic is available with the following indexes of refraction: 1.54, 1.55, 1.56, 1.6, and 1.66. An eye professional can advise on what type of high index lens material is best for your prescription and budget. Because they are typically processed to be as thin as possible, and because high index is a plastic that will crack when enough force is applied, many pairs of high index prescription lenses would fail an impact resistance test. MR™ Series is especially suitable for ophthalmic lenses and is known as the first thiourethane based high index lens material. Thicker lenses are more affordable, but can only accommodate lower vision correction needs. And remember – better safe than sorry! Thinner and lighter than plastic, polycarbonate (impact-resistant) lenses are shatter-proof and provide 100% UV protection, making them the optimal choice for kids and active adults. It's easy to do. The difference between your glasses' lens index can make a huge impact. The high index does not provide additional impact resistance, it depends only on the material. High Index Lenses Of course, high index lenses are in a separate category precisely because their refractive index is far above the rest. Our goal is to provide our customers with affordable, top-of-the-line prescription safety and prescription eyewear. It covers the same range as the 1.57 mid-index lens: -4.00/+2.00 or lower on the SPH and +/- 6.00 or lower on the CYL. Learn more about how Polycarbonate lenses or impact-resistant lenses are up to 10 times more impact resistant than regular plastic lenses. Rx Safety prides itself in high quality glasses at reasonable prices manufactured in house with our top of the line digital surfacing laboratory, with a wide variety of prescription and non prescription options to suit all your eyewear needs. Do high-index lenses cause distortion? I have. It is also not easily scratched. The power and base curve of the lens will also affect its impact resistance. Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. The glasses I'm using currently are hi-index plastic and while it's ok, it doesn't feel, Q: Please help. The higher the number, the thinner and lighter the lens. Rx-Safety.com is a family-owned and – run optical lab and online store. So I suggest you to use the same polycarbonate you had before, that offers the most protection for your lenses. Polycarbonate lenses are made of a type of plastic that is more impact-resistant than standard plastic lenses. Their refractive index rises above 1.59 and can range from 1.60 to 1.74. As well as their similar weight and thickness, both lenses provide comparable impact resistance. You only have one pair of eyes, so it’s a good idea to protect them. However, labs would generally surface this material down to 1.5 mm and then perhaps add an AR coating to it. They have a refractive index of 1.586 and due to its impact resistant quality are used primarily for children’s eyewear, safety glasses, and sports eyewear. I am now on my third eyeglasses that are showing machine like even crackling scratches INSIDE the lenses themselves. If you have the knowledge or experience that others would want, you can do the same and create a website from scratch about your hobby, using the right tools. Simply click here to return to FAQ. High-index lenses have a low Abbe value, which means they disperse more light than traditional lenses. If you choose a high index lens, all of it will be thinner at the center and edge, so more sensitive to scratches and breaking. Conversely, polycarbonate, one of the lowest-index lenses, is extremely impact resistant and flexible but very soft and easy to scratch. Many of these people may prefer high index lenses, which raises the question: The answer, simply, is no, they are not. Since then, polycarbonate lenses have become the standard for safety glasses, sports goggles and children's eyewear. In Grand Forks and Thief River Falls contact North Dakota Eye Clinic for more information today. Compared with polycarbonate lenses, Trivex® is a premium material that provides crisper vision and is 10% lighter. This softness means both Trivex and polycarbonate can absorb impact rather than fracturing. For instance, a high-index lens material might be 5x more impact-resistant than hard resin at the same 2.0 mm center thickness. They are also very resistant to unusual problems, like several chemicals. Polycarbonate lenses have superior impact resistance and are lighter than regular plastic lenses. Hi-index plastic is lightweight and thinner than most plastic. High index lenses are the thinnest lenses for stronger prescriptions. A comparison between polycarbonate and high-index lenses. Impact-resistant lenses reduce the number of eye injuries from eyeglasses and sunglasses. Impact resistant lenses are manufactured using an injection molding process which makes them stronger than standard lens materials. Polycarbonate lenses also have built-in ultraviolet protection. They are considered a high index plastic. Polycarbonate 1.59 index lenses are a thin and lightweight material, that is very resistant to impacts. Lenses made from Trivex are extremely resistant to common problems like being dropped or scratched. Some of these lens indices may not be available at all depending on how strong or weak your prescription is. Polycarbonate Lenses are ideal for rimless frames or anyone using their glasses for sporting activities. These also block 100% of UV rays. We High-impact resistant polycarbonate lenses are ideal for: Children; Athletes; People with mild to moderate prescriptions; Rimless and semi-rimless frames; Our polycarbonate lenses include polished edges as well as scratch-resistant and UV-protection coatings. High index lenses refer to one of several different kinds of plastic lens material. Required fields are marked *. Like Perfect-Eyeglasses-Guide.com on Facebook. Any lens material with a refractive index higher than these numbers are considered a highly index lens material. If your lenses are thick enough to have standard (safety) impact resistance, you may be able to have your optical provider supply you with a Z87 stamp, certifying them as safety glasses (as long as the frame they’re in is also safety). Excellent optical materials with high refractive index, high Abbe number, low specific gravity and high impact resistance are provided by polymerizing monomers of MR™ Series. The most basic lens, often referred to as CR-39 lenses (though that is a PPG owned brand / monomer), replaced glass as the original lens material. This material is so tough and shatter resistant that it is also used to manufacture airplane windows. Thinner lenses are lightweight (and more stylish!) High index lenses are more scratch-resistant than polycarbonate, so if you’re looking for lens longevity as opposed to impact resistance, high index plastic is still probably the best choice. Most high index plastics rate relatively the same for scratch resistance, and any high index plastic is going to be more scratch resistant than … High index lenses are not naturally impact resistant. Some people with strong prescriptions also need safety eye-wear or are interested in getting lenses that are impact resistant to protect their eyes better during work or hobbies. Learn more about how Polycarbonate lenses or impact-resistant lenses are up to 10 times more impact resistant than regular plastic lenses. MR™ Series offers a variety of products to provide the best solution for optical lens users. How? Join in and write your own page! California Prop 65 Warning » Hi-Index 1.67. Trivex lenses have crisper optics, and may have sharper central vision than Polycarbonate lenses. Eyeglass lenses made of polycarbonate were introduced in the early 1980s in response to a demand for lightweight, impact-resistant lenses. Environment, it does not contain the impact resistance 'm using currently are hi-index plastic available. Are a thin and lightweight material, that is more impact-resistant than standard lens materials 48. Protection for your prescription is not very high, or astigmatism prescription is not very high, astigmatism. At the same 2.0 mm center thickness comfort and clear visioneven when wear. 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