up. Different b/t high index lens and regular lens. Disadvantages. Plastic Lenses – CR39 (1.5 Index) CR 39 is the most common optical polymer in the ophthalmic field. The most obvious drawback of high index lenses is their cost. Contents hide. Perhaps the most obvious disadvantage is the higher cost of high index lenses, which can be significant. This is because they take longer to thin down and waste more material from the grinding and finishing processes during manufacture. What are the advantages and disadvantages of high index spectacle lenses? Durability. Deciding which you should get depends on … Its main disadvantage is that the lens can be more reflective than conventional lenses, but this can be more than overcome with an anti-reflection coating. But the optician reckons they're superior lenses? These types of lenses are thinner and lighter than normal, which means the back surface of the lens is placed further away from the natural curve of your eye. Contact lenses are thin discs of plastic or glass that sit directly on your eye to correct … If you do choose to buy frames with high-index lenses, then you should always pair them with an anti-reflective coating. UV lenses can provide some protection for your eyelids and the skin around your eyes. Trivex is a material developed for military purposes. Here are some advantages of polycarbonate lenses: Durable, providing extra safety to your eyes and promoting better eye health; 10 … 4. For stronger prescriptions, the overall result will not be as thin as Glass High Index Lenses. Disadvantages. You get what you … Our polycarbonate lenses have a 1.59 index which, while quite thin, is more focused on durability than lightness. Save my name, email, and website in this browser for the next time I comment. And when the subject is eyeglasses, weight and thickness can mean a lot. However, That not means the higher the index of the lenses, the better the eyeglasses lenses. However, if your prescription is either above a +3.00 or a -4.00 I generally recommend considering high index to control some of the chromatic aberration and to provide a cosmetically thinner lens. And in the eye-wear world, less material is a huge advantage. Compared to the conventional plastic or glass lenses, high index lenses can be up to three times the regular price but again, depending on the prescription. 15; If you have a high-index glass or polycarbonate lenses, you already have built-in UV light protection. The advantages of this type of material is that it is thinner than standard plastic and therefore also usually lighter. The Disadvantages of Choosing High Index Lenses for Your Sunglasses. The Advantages of High Index Lenses. 48%. For the best vision and appearance, it's a good idea to have an anti-reflective lens coating (AR coating) applied to high-index lenses. The expense is primarily due to the added cost of the manufacturing process which, of course, is passed along to consumers. Many spectacle wearers are … How are they made? Our High Index Lenses Include Free Coatings: With fewer reflections, more light passes through the lens to the eye for good vision and the lenses look more transparent and attractive. High index lenses are made from a chemical synthetic blend that's created through a special manufacturing process. The suggested prescription range is +/-4.00 to +/-8.00 sphere. Also, generally speaking, the higher the index, the higher the cost of the lenses. Finally, high index lenses can be more brittle and are definitely more reflective than standard materials. Even within the high index spectrum, prices range dramatically; a 1.90 high index lens, for example, is about three times the cost of a 1.67 high index lens. More Brittle What are the disadvantages of progressive lenses? The positive qualities of high index lenses apply to a large group of corrective eye-wear consumers but not to all. Ultimately, like other lenses on the market today, high index lenses get the job done. Abbe Value It is more expensive than polycarbonate. For the same prescription lenses, the higher the index, the thinner and lighter the lenses are. 2 Lens … Loading High index lenses 1010111770li Nov 8, 2015 . There are also several downsides to consider before opting for high index lenses in your outdoor eyewear. This problem can easily be remedied with the application of an anti-glare coating, but it’s another factor to bear in mind when weighing the pros and cons of high index lenses. Because high index lenses may be more prone to scratches than standard corrective lenses, they may not be an ideal choice for avid beachgoers or other folks spending time on rugged outdoor activities … Abbe value, which is a measurement of lens distortion, is also increased in high index lenses. All eyeglass wearers should weigh both the pros and cons of polycarbonate lenses before making any purchasing decisions. The higher the index rating, the less material required to make a lens in a particular prescription. DISADVANTAGES OF HIGH INDEX LENSES Price. Nevertheless, various issues remained, including … The cost is due to the manufacturing process as it is more complicated and requires more precision in crafting thinner and … The manufacturing process is more complicated and requires more precision as compared to other types of lenses. High-index glass is an option in some situations but will not be addressed in this article. Can shatter or chip easier than lenses made of other materials. Disadvantages: At least twice the weight of plastic or polycarbonate lenses. ADC lenses had several disadvantages, including low refractive index, and tended to be thick and cosmetically unappealing. Learn the pros and cons of Trivex lenses. So, they are the idea choices for people with strong prescription. Thinner, lighter and more expensive than mid-high index or hard … It’s important to note comparisons made in this article are between high-index and polycarbonate plastics only. 1.74 High Index Lenses. Lenses made from Trivex cannot offer the same degree of thinness as high-index lenses. So, always wear sunscreen along with your glasses. GRIN lenses with a 4th order index of refraction profile will image significantly better than 2nd order lenses. © RX Safety - Developed by ISEA Media & Cosmick Technologies. AR-coated high-index lenses transmit up to 99.5 percent of light to the eye for optimum vision. Index 1.5 lenses are … watch the video. Required fields are marked *. With an antireflective coating, you can solve this problem. I got my existing frames reglazed online. Compared to regular lenses, high-index lenses refract light in a different way, allowing the lenses to use less material. 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. Our goal is to provide our customers with affordable, top-of-the-line prescription safety and prescription eyewear. Before choosing high-index, speak with your eye doctor to determine if these lenses are necessary for your individual prescription. A mid index 1.57 is plenty in this -2.00 diopter scenario. Thinner high index lens edges allow for greater flexibility in frame style. 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. / Advantages / Disadvantages / Best candidate / Classification / Higher Indices …will be Thinner / Recommendation / AR Coating: A Perfect Companion for High-Index Lenses / Myths . High-index lenses reflect up to 50 percent more light than conventional glass or plastic lenses. Specifically, we are going to look at their advantages and disadvantages so that you can better decide whether 1.67 high index lenses are for you. It is a sturdy, high-quality, very clear plastic that works well for prescription glasses. They also come in many varieties of the progressive- and single-vision format. Your email address will not be published. They can sharpen your sight even further if you apply an anti-glare coati… More Reflective According to your prescription, you needn't use 1.6 index lens. For stronger prescriptions, the overall result will not be as thin as Glass High Index Lenses. – glass high index lenses are probably not the best choice. If you have a very slight corrective prescription, you might not enjoy much of a boost here; however, the stronger your prescription gets, the more benefit you’ll receive. • Mid index – 1.54 to 1.63. This means that stronger prescriptions are lighter and thinner when formed from high index material. They also come in many varieties of the progressive- and single-vision format. Eyeglasses are easy. Thinner lenses have three advantages: they do not look thick, they do not magnify or minify your eyes when seen by others, and they are lighter. So many variables play into the equation that, unless you’re an expert, you often don’t know what to choose in order to maximize your opportunities and get exactly what you want and need. Because of this, if you were to purchase standard lenses, you would notice that your lenses start to become heavy on your face. Is it just my imagination? A higher Abbe value means less distortion, a lower value equates to more distortion. If you are already at -2.00 diopters or less, spending the extra money will make no noticeable difference for you. 1 Prescription range is an important factor. The main disadvantage of high index lenses would be the price point. Was this answer helpful? Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. Thinnest lenses for high prescription. Contacts. Keep in mind that antireflective coatings can deteriorate with everyday wear and tear. Hi, My prescription is -0.75 sph and -0.1 sph. 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