Compared to conventional lenses, high index lenses are much thinner and lighter. And when the subject is eyeglasses, weight and thickness can mean a lot. Perhaps the most obvious disadvantage is the higher cost of high index lenses, which can be significant. Anti-reflective coatings allow 99.5 percent of available light to pass through the lenses and enter the … 1. The bottom line? You put them on and go. The advantages of this type of material is that it is thinner than standard plastic and therefore also usually lighter. However, high index lenses are more reflective and expensive than conventional lenses. The lenses are a high-index plastic material. Higher cost; Abbe value; More brittle and reflective; Perhaps the most … High index lenses are especially useful for people with high prescriptions. The added costs are because high index lenses simply cost more to produce. Compared with traditional lenses, highly index lenses can bend the light more efficiently, so they can be thinner while maintaining the same correction power. Lisa Anderson This is a mind map talking about High index lenses. Contacts. 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. The higher a lens' index is, the thinner it becomes. • High index – 1.64 to 1.73. up. Disadvantages of Plastic High Index Lenses Even with a good quality scratch resistant coating, care still needs to be taken as plastic lenses are easy to scratch. High-index lenses are more efficient in bending light and correcting for refractive errors, and so the result is a thinner, lighter lens. These plastic lenses are thinner and lighter than typical standard lenses. Consider also that you will likely not wear those glasses for more than a few months, if you are working on vision improvement. For stronger prescriptions, the overall result will not be as thin as Glass High Index Lenses. If you do choose to buy frames with high-index lenses, then you should always pair them with an anti-reflective coating. About 25 to 40 percent thicker than polycarbonate and high index plastic lenses. Was this answer helpful? Advantages. 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. It’s named after German physicist and mathematician Ernst Abbe, who discovered that different materials yield different levels of chromic aberration. 16 Because high index lenses can form prescriptions using less physical material, they provide lenses that are both lighter and thinner than identical lenses formed out of standard glass or plastic. 3 Duplicate. This is possible because of the more advanced material used. Can shatter or chip easier than lenses made of other materials. A thick standard glass or plastic lens will have edges that stick out from behind your frames. 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 … More Reflective The cost is due to the manufacturing process as it is more complicated and requires more precision in crafting thinner and … Disadvantages. Disadvantages of high-index lenses. So we’ll examine the two most common lens materials here and present the advantages and disadvantages you should be aware of. I got my existing frames reglazed online. Your eye doctor can also provide more information on any specific questions you may have. They're lightweight and stylish, but are mostly reserved for those with higher vision correction needs. Disadvantages: At least twice the weight of plastic or polycarbonate lenses. All eyeglass wearers should weigh both the pros and cons of polycarbonate lenses before making any purchasing decisions. These types of lenses are thinner and lighter than conventional lenses; however, high index lenses do come with a downside. Glass offers the best optical clarity of any lens, but with some … The Super Lenti is a custom-manufactured series of blended lenses for high myopes which attempts to eliminate the obvious mechanical and cosmetic disadvantages of high minus lenses and is available in powers from -12.00D to -48.00D in glass and -12.00D to -22.00D in resin. 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. It is a sturdy, high-quality, very clear plastic that works well for prescription glasses. Anti reflection coating is especially beneficial when used on high-index lenses, which reflect more light than regular plastic lenses. If you are already at -2.00 diopters or less, spending the extra money will make no noticeable difference for you. A high-index eyeglass lens allows people with a stronger prescription to wear a lens that is lightweight and thin. For the same prescription lenses, the higher the index, the thinner and lighter the lenses are. 1. High-index lenses can also be used to improve the fit of lenses in the frame. It refers to the type of … Although there are numerous benefits to high index lenses, there are also several potential disadvantages that should be taken into consideration prior to purchase. Suitability According to "Eyecare Professional Magazine," with some prescriptions, there would be little or no advantage in having a high index lens, because the weight and thickness benefits between a high index lens and a conventional lens would be minimal. There are some potential drawbacks to high-index lenses: Highly reflective, which can cause glare (we recommend an anti-reflective lens coating) Higher cost than traditional lenses More rigid, which can make it easier to damage them • Mid index – 1.54 to 1.63. Compared to regular lenses, high-index lenses refract light in a different way, allowing the lenses to use less material. But compared to other types of lenses, they offer some distinct benefits and advantages. Lens that would be extremely thick and heavy if made of standard material can be considerably thinner and lighter if formed of high index material. High index lenses offer extra visual correction. So, they are the idea choices for people with strong prescription. A mid index 1.57 is plenty in this -2.00 diopter scenario. Polycarbonate Lenses Advantages & Disadvantages. High Index Lenses Disadvantages. Here are some advantages of polycarbonate lenses: Durable, providing extra safety to your eyes and promoting better eye health; 10 … For example, your prescription may be … The following are the advantages of anti-radiation prescription glasses.. 1. 6 7. This ensures more comfortable glasses even if your farsightedness, nearsightedness, or astigmatism prescription is high. Nevertheless, various issues remained, including … In addition to this, hi index lens materials can also cause a distortion of peripheral vision. High-index lenses reflect up to 50 percent more light than conventional glass or plastic lenses. Reduced edge size also relates to the thinness of the high index lens. Many eye care professionals also recommend adding anti-reflective and anti-scratch coatings to high-index … Trivex is a material developed for military purposes. Advantages . If you have a strong prescription, you'd better get high index lens with anti-reflective coating. If you are mildly shortsighted, your lens prescription might say -2.00 D. If yo… How are they made? © RX Safety - Developed by ISEA Media & Cosmick Technologies. If you want to get high index lens, you can ask the optician to add an anti-reflective coating to the lenses. High index lenses disadvantages Higher cost. Higher Cost These lenses are super-thin but are also more expensive than the polycarbonate option. The positive qualities of high index lenses apply to a large group of corrective eye-wear consumers but not to all. If high index lenses cannot offer you a noticeable reduction in weight or increase in appearance, they may not be worth the higher cost to you. 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. Different b/t high index lens and regular lens. Save my name, email, and website in this browser for the next time I comment. Good for prescriptions over +/-8.00. High Index Material Disadvantages. So while the thinner, lighter high indexes offer cosmetic benefits, they do not surpass traditional lenses in vision quality. Even with a good quality scratch resistant coating, care still needs to be taken as plastic lenses are easier to scratch. Abbe Value up. Regular Lenses vs. High-Index Lenses . 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. Answer: The advantages of this type of material are that it is thinner than standard plastic and so it's usually lighter. Your eyeglass prescription also determines what kind of high-index … 2 Lens … According to your prescription, you needn't use 1.6 index lens. You can create a mind map like this effortlessly. The main disadvantage of high index lenses would be the price point. Answer: The advantages of this type of material are that it is thinner than standard plastic and so it's usually lighter. 1.67 vs 1.74 High Index Lenses – What You Need to Know. Disadvantages. Tags: others product Similar Mind Maps Outline The inherent makeup of the lenses that you choose for your new pair of prescription glasses will have a significant impact on how … … With so many lens materials and lens treatment combinations available, knowing when to recommend one high-index lens versus another can seem like a numbers game. The Advantages of High Index Lenses. The Disadvantages of Choosing High Index Lenses for Your Sunglasses. Was this answer helpful? Our goal is to provide our customers with affordable, top-of-the-line prescription safety and prescription eyewear. The first advantage on this list leads to many of the others, and gives high index lenses their name. And opted for bog standard 1.5 index mutilcoated lenses. If one is not a careful handler of glasses – you know who you are! Why are high index lenses so expensive? Index 1.5 lenses are … High Index Lenses. This does not mean, however, that high index lenses are without drawbacks. Conventional lenses reflect 8 per cent of light, while high index lenses reflect up to 50 per cent of light. 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. In midindex lenses, the ABBE value falls to 42, and in a 1.67 high index the value falls further to 32. Though it is expensive, it worths. High-index lenses may be just the solution you have been searching for. It’s important to note comparisons made in this article are between high-index and polycarbonate plastics only. Also available as Double Aspheric lenses (they are surfaced on both sides to give a flatter and thinner look than standard high index lenses) Disadvantages of Plastic High Index Lenses Even with a good quality scratch resistant coating, care still needs to be taken as plastic lenses are easy to scratch. The measurement of an index describes how much light is refracted, or bent, through the material. Your email address will not be published. Your email address will not be published. 50%. Thinner, lighter and more expensive than mid-high index or hard … Nevertheless, one of the more important choices that you will have to make focuses on your lens material. High index lenses are made of a plastic material which bends light more than standard CR39 lenses and can therefore be made thinner and lighter allowing for more cosmetically appealing and comfortable to wear glasses.. Many spectacle wearers are … Eyeglasses are easy. Zenni, as example, sells very high index lenses (1.74) for about 80 USD upgrade cost. But they don’t block all damaging sunlight. You get what you … High index lenses are made from a chemical synthetic blend that's created through a special manufacturing process. Take Away Ultimately, like other lenses on the market today, high index lenses get the job done. Trivex … Glasses, Buying glasses. And in the eye-wear world, less material is a huge advantage. Higher index results in less use of material, Allows for multiple single- and progressive-use designs. The manufacturing process is more complicated and requires more precision as compared to other types of lenses. Contents hide. Rx-Safety.com is a family-owned and – run optical lab and online store. © RX Safety - Developed by ISEA Media & Cosmick Technologies. High index lenses with 1.60 high index are good for people with prescriptions over +/-4.00 sphere, because they are thinner and lighter. 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. Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. Cost. However, That not means the higher the index of the lenses, the better the eyeglasses lenses. Also, generally speaking, the higher the index, the higher the cost of the lenses. The expense is due to the added cost of the manufacturing process and material waste that is associated with the more exacting process of forming, grinding, and finishing high index prescriptions. These lenses are super-thin but are also more expensive than the polycarbonate option. Contact lenses are thin discs of plastic or glass that sit directly on your eye to correct … Today we’ll examine both the pros and cons of high index lenses and hopefully give you a better idea of whether or not they’re right for you. High index lenses have a lower Abbe rating than identical prescriptions formed from standard material. The technical definition for high-index lenses is any lens with a refractive index higher than 1.523. Any lens material with a refractive index higher … More Brittle Download. Another type of lens that can cause peripheral distortions are multifocal lenses. • Normal index – 1.48 to 1.53. 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. 5 6. However, That not means the higher the index of the lenses, the better the eyeglasses lenses. Abbe value, which is a measurement of lens distortion, is also increased in high index lenses. The amount of light-bending ability (lens power) that's needed to provide good vision is indicated on the spectacle prescription provided by your optician. We offer a few different indexes on our lenses. Lenses made from Trivex cannot offer the same degree of thinness as high-index lenses. Advantages . Map Outline High index lenses Refractive Index . Hi, My prescription is -0.75 sph and -0.1 sph. The benefits of high index lenses are hard to overlook. Lens index is a number that describes how thick or thin your lenses are. Compared with traditional lenses, highly index lenses can bend the light more efficiently, so they can be thinner while maintaining the same correction power. According to your prescription, you needn't use 1.6 index lens. We offer a few different indexes on our lenses. What are the advantages and disadvantages of high index spectacle lenses? Different b/t high index lens and regular lens. Shopping for eyeglasses can be complex. Anti-radiation glasses adopt the advanced vacuum ion plating technology and can block the electromagnetic radiation, therefore have no side effects to eyes. 48%. Finally, high index lenses can be more brittle and are definitely more reflective than standard materials. Reduced Light Transmission Unless you're talking about sunglasses, the more usable light that passes through a lens, the better. The suggested prescription range is +/-4.00 to +/-8.00 sphere. 3 Duplicate. The expense is primarily due to the added cost of the manufacturing process which, of course, is passed along to consumers. Because of this, an anti-glare coating is strongly recommended with the purchase of high index lenses. And because AR coating virtually eliminates lens reflections, it makes high-index … A higher Abbe value means less distortion, a lower value equates to more distortion. 4. Your email address will not be published. Require a special coating to provide 100% UV protection. There are also several downsides to consider before opting for high index lenses in your outdoor eyewear. Glass Lenses. This means that stronger prescriptions are lighter and thinner when formed from high index material. Glasses: Pros. Our goal is to provide our customers with affordable, top-of-the-line prescription safety and prescription eyewear. This is a specialty material that is recommended as a substitute for polycarbonate lenses. Buy High Index Lenses. Disadvantages of Double Aspheric Lenses. 1.74 high index and above is only available in glass, and high index glass lenses are relatively brittle. Lenses with a high refractive index are more costly to make. If you are already at -2.00 diopters or less, spending the extra money will make no noticeable difference for you. For stronger prescriptions, the overall result will not be as thin as Glass High Index Lenses. But having said this, high index lenses are of higher quality. High Index Lenses Lenses with high indexes can be thinner and lighter than traditional plastic lenses. 1.74 high index and above is only available in glass, and high index glass lenses are more brittle and easier to break than plastic. HI INDEX The term “hi index” refers to the lenses whose index of refraction is higher than 1.49 in plastics and more than 1.523 in glass. A mid index 1.57 is plenty in this -2.00 diopter scenario. 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