A high-index eyeglass lens allows people with a stronger prescription to wear a lens that is lightweight and thin. These lenses are perfect for anyone with stronger prescriptions, but not only limited to just those individuals. Impact-resistant lenses reduce the number of eye injuries from eyeglasses and sunglasses. Copyright Â© 2020 Perfect-Eyeglasses-Guide.Com. They are also very resistant to unusual problems, like several chemicals. This material is so tough and shatter resistant that it is also used to manufacture airplane windows. This softness means both Trivex and polycarbonate can absorb impact rather than fracturing. by Dick 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. For strong prescription, the higher the index, the thinner the lens; for weak prescriptions, a low index lens will be no thicker than high index eyeglass lenses. An eye professional can advise on what type of high index lens material is best for your prescription and budget. Q: I want to get plastic lenses because of the high abbe value. This will come down to personal preference, but they can be game-changers for people used to thick, heavy lenses. MR™ Series offers a variety of products to provide the best solution for optical lens users. Polycarbonate Lenses are ideal for rimless frames or anyone using their glasses for sporting activities. Hi, I'm Endre with my brother Arpi. Conversely, polycarbonate, one of the lowest-index lenses, is extremely impact resistant and flexible but very soft and easy to scratch. Learn more about how Polycarbonate lenses or impact-resistant lenses are up to 10 times more impact resistant than regular plastic lenses. Thicker lenses are more affordable, but can only accommodate lower vision correction needs. Polycarbonate 1.59 index lenses are a thin and lightweight material, that is very resistant to impacts. The high index does not provide additional impact resistance, it depends only on the material. However, labs would generally surface this material down to 1.5 mm and then perhaps add an AR coating to it. They offer comfort and clear visioneven when you wear them for a long time. High-index plastic is available with the following indexes of refraction: 1.54, 1.55, 1.56, 1.6, and 1.66. High index lenses refer to one of several different kinds of plastic lens material. Polycarbonate lenses are made of a type of plastic that is more impact-resistant than standard plastic lenses. Join in and write your own page! Q: I've worn polycarbonate lenses for many years because of a strong prescription (-6.5/ -7.5). 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. 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. © RX Safety - Developed by ISEA Media & Cosmick Technologies. Your email address will not be published. This ensures more comfortable glasses even if your farsightedness, nearsightedness, or astigmatism prescription is high. The glasses I'm using currently are hi-index plastic and while it's ok, it doesn't feel, Q: Please help. Deciding which you should get depends on your prescription and your lifestyle. And remember – better safe than sorry! Join in and write your own page! I am now on my third eyeglasses that are showing machine like even crackling scratches INSIDE the lenses themselves. Simply click here to return to. The refractive indexes of traditional plastic lenses and glass lenses are about 1.5 and 1.52 respectively. High index lenses are not naturally impact resistant. How thick would plastic lenses be on a round size 48 frame? 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. 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. 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. and can accommodate MANY kinds of vision needs, including higher prescriptions. High index lenses are not naturally impact resistant. It is important to consider the fact that, in a dangerous environment, it is a poor decision to trade safety for aesthetics. 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. 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. 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. Polycarbonate is a good choice for impact resistance if your prescription is not very high, or if you need. For instance, a high-index lens material might be 5x more impact-resistant than hard resin at the same 2.0 mm center thickness. 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). It is also worth noting that you do not want to have any issues with OSHA should they visit a job site while you’re wearing questionably suited glasses for your work. It's easy to do. Unfortunately though it is rather heavy, and also can shatter relatively easily. They are impact resistant, scratch resistant and UV coated. The 1.53 mid-index Trivex lens is a polymer lens that is the most impact-resistant lens available. You only have one pair of eyes, so it’s a good idea to protect them. (Ames, Iowa). High-index lenses have an index of refraction that starts at around 1.61 and can go as high as 1.74. Most high index plastics rate relatively the same for scratch resistance, and any high index plastic is going to be more scratch resistant than … Lenses made from Trivex are extremely resistant to common problems like being dropped or scratched. 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. 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. The power and base curve of the lens will also affect its impact resistance. 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. A comparison between polycarbonate and high-index lenses. The impact resistance is a welcome side effect. How to Choose the Right Glasses Lens Differences among different lens indexes can generate great impacts. The lower numbers are classified as mid-index lenses. All high-index lenses sold on Eyeconic.com are scratch and impact resistant. 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. Trivex® lenses are impact resistant and more lightweight than standard lenses. It does not contain the impact resistant qualities of polycarbonate. These also block 100% of UV rays. Rx-Safety.com is a family-owned and – run optical lab and online store. California Prop 65 Warning » Hi-Index 1.67. Got a new pair of glasses with bifocals and noticed that the left bifocal is slightly tilted and at a different height than the right. Are high-index lenses worth the extra cost? Are High Index Lenses Also Impact Resistant? Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. 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