Because of this, if you were to purchase standard lenses, you would notice that your lenses start to become heavy on your face. Even with a good quality scratch resistant coating, care still needs to be taken as plastic lenses are easier to scratch. Higher index results in less use of material, Allows for multiple single- and progressive-use designs. Learn the pros and cons of Trivex lenses. For stronger prescriptions, the overall result will not be as thin as Glass High Index Lenses. Nevertheless, various issues remained, including … And in the eye-wear world, less material is a huge advantage. The Advantages of High Index Lenses. 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 While most prescriptions are compatible with more than one specific index, it's up to you to decide which one fits your personal needs! The overall length of your GRIN lens should stick far enough out of the skull to allow you to hold it during implantation and cement it to the skull. The advantages of this type of material is that it is thinner than standard plastic and therefore also usually lighter. High-index lenses can improve lens comfort and appearance, and can even open the door to a larger variety of frames. 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. 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 … 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. This distance can in turn affect your peripheral view. Reduced edge size also relates to the thinness of the high index lens. But the optician reckons they're superior lenses? DISADVANTAGES OF HIGH INDEX LENSES Price. Contents hide. What are the advantages and disadvantages of high index spectacle lenses? The benefits of high index lenses are hard to overlook. High index lenses are made for people with strong prescription. UV lenses can provide some protection for your eyelids and the skin around your eyes. • High index – 1.64 to 1.73. 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. High costs. You put them on and go. It refers to the type of … So, they are the idea choices for people with strong prescription. up. For example, your prescription may be … Our goal is to provide our customers with affordable, top-of-the-line prescription safety and prescription eyewear. For example, if a polycarbonate lens requires 2 millimeters of material to refract light, high-index may only need 1 millimeter. 3 Duplicate. / Advantages / Disadvantages / Best candidate / Classification / Higher Indices …will be Thinner / Recommendation / AR Coating: A Perfect Companion for High-Index Lenses / Myths . The bottom line? Refractive errors and lens powers required to correct them are measured in units called dioptres (D). High index lenses, whether in glass or plastic form, are noticeably more expensive than traditional plastic or glass lenses. The lenses are a high-index plastic material. Your email address will not be published. About 25 to 40 percent thicker than polycarbonate and high index plastic lenses. Take Away Another type of lens that can cause peripheral distortions are multifocal lenses. Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. All eyeglass wearers should weigh both the pros and cons of polycarbonate lenses before making any purchasing decisions. Glasses, Buying glasses. I got my existing frames reglazed online. Spectacle lenses correct refractive errors by bending (refracting) light as it passes through the lens. Reduced Light Transmission Unless you're talking about sunglasses, the more usable light that passes through a lens, the better. High-index lenses are more efficient in bending light and correcting for refractive errors, and so the result is a thinner, lighter lens. This high percentage can lead to eye fatigue and make night driving difficult. 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. 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. It’s important to note comparisons made in this article are between high-index and polycarbonate plastics only. The higher the index rating, the less material required to make a lens in a particular prescription. Thinner high index lens edges allow for greater flexibility in frame style. But compared to other types of lenses, they offer some distinct benefits and advantages. Many eye care professionals also recommend adding anti-reflective and anti-scratch coatings to high-index … 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. Many spectacle wearers are … The first advantage on this list leads to many of the others, and gives high index lenses their name. Here are some advantages of polycarbonate lenses: Durable, providing extra safety to your eyes and promoting better eye health; 10 … If you are mildly shortsighted, your lens prescription might say -2.00 D. If yo… Glasses: Pros. Not enough thinness. Contacts. This is because they take longer to thin down and waste more material from the grinding and finishing processes during manufacture. up. Advantages . Contact lenses are thin discs of plastic or glass that sit directly on your eye to correct … Consider also that you will likely not wear those glasses for more than a few months, if you are working on vision improvement. Rx-Safety.com is a family-owned and – run optical lab and online store. 2 Lens … If you have a strong prescription, you'd better get high index lens with anti-reflective coating. 48%. Glass Lenses. This is a specialty material that is recommended as a substitute for polycarbonate lenses. The manufacturing process is more complicated and requires more precision as compared to other types of lenses. High index lenses have a lower Abbe rating than identical prescriptions formed from standard material. The suggested prescription range is +/-4.00 to +/-8.00 sphere. Due to the chemical makeup of the material from which they are created, high index lenses have more refractive power than standard plastic or glass. 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. Conventional lenses reflect 8 per cent of light, while high index lenses reflect up to 50 per cent of light. 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 higher a lens' index is, the thinner it becomes. The measurement of an index describes how much light is refracted, or bent, through the material. Abbe Value Advantages. Different b/t high index lens and regular lens. The technical definition for high-index lenses is any lens with a refractive index higher than 1.523. ... For instance, a high-index progressive lens might cost $350, whereas you might pay $310 for a high … And opted for bog standard 1.5 index mutilcoated lenses. 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. Required fields are marked *. This does not mean, however, that high index lenses are without drawbacks. 1.67 vs 1.74 High Index Lenses – What You Need to Know. Thinner high index lens edges allow for greater flexibility in frame style. So we’ll examine the two most common lens materials here and present the advantages and disadvantages you should be aware of. 1. Disadvantages: At least twice the weight of plastic or polycarbonate lenses. These lenses are super-thin but are also more expensive than the polycarbonate option. 50%. The cost is due to the manufacturing process as it is more complicated and requires more precision in crafting thinner and … 3 Duplicate. Was this answer helpful? 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 Lenses with high indexes can be thinner and lighter than traditional plastic lenses. Thinner, lighter and more expensive than mid-high index or hard … A thick standard glass or plastic lens will have edges that stick out from behind your frames. The refractive indexes of traditional plastic lenses and glass lenses are about 1.5 and 1.52 respectively. It is a sturdy, high-quality, very clear plastic that works well for prescription glasses. By their very nature and chemical makeup, high index lenses have distinct advantages over standard plastic or glass. You get what you … Answer: The advantages of this type of material are that it is thinner than standard plastic and so it's usually lighter. Before purchasing new lenses, discuss the advantages and disadvantages of high-index lenses with your eye doctor. Download. 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. Anti-reflective coatings allow 99.5 percent of available light to pass through the lenses and enter the … Lisa Anderson This is a mind map talking about High index lenses. By choosing these lenses you won’t need to worry about whether you will be able to see clearly. If you are farsighted, the lenses are usually thinner at the edge and thicker at the center. Different b/t high index lens and regular lens. They can sharpen your sight even further if you apply an anti-glare coati… 4. 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.. … Abbe value, which is a measurement of lens distortion, is also increased in high index lenses. According to your prescription, you needn't use 1.6 index lens. Later, plastic materials such as acrylic and polycarbonate entered widespread use as medium refractive index materials for eyeglass lenses. High index lenses are made from a chemical synthetic blend that's created through a special manufacturing process. So while the thinner, lighter high indexes offer cosmetic benefits, they do not surpass traditional lenses in vision quality. 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. Disadvantages. Because of this, an anti-glare coating is strongly recommended with the purchase of high index lenses. 1. Hi, My prescription is -0.75 sph and -0.1 sph. A high-index eyeglass lens allows people with a stronger prescription to wear a lens that is lightweight and thin. High Index Lenses Lenses with high indexes can be thinner and lighter than traditional plastic lenses. As the same suggests, this coating helps in reducing excessive reflections and … Compared with traditional lenses, highly index lenses can bend the light more efficiently, so they can be thinner while maintaining the same correction power. High index lenses are especially useful for people with high prescriptions. The difference between your glasses' lens index can make a huge impact. Units called diopters are used to measure the lens power necessary to correct refractive errors. Loading High index lenses 1010111770li Nov 8, 2015 . Eyeglasses are easy. 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. The positive qualities of high index lenses apply to a large group of corrective eye-wear consumers but not to all. For instance, a high-index progressive lens might cost $350, whereas you might pay $310 for a high-definition progressive lens. At the same time, there is less need for high index, if you have a very low prescription. © RX Safety - Developed by ISEA Media & Cosmick Technologies. How are they made? High index lenses with 1.60 high index are good for people with prescriptions over +/-4.00 sphere, because they are thinner and lighter. 1.74 High Index Lenses. Disadvantages. These plastic lenses are thinner and lighter than typical standard lenses. More Brittle They also come in many varieties of the progressive- and single-vision format. Was this answer helpful? Your eyeglass prescription also determines what kind of high-index … So, always wear sunscreen along with your glasses. 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 spectacle lenses are the right choice if you want thinner, lighter lenses and glasses that are as attractive and comfortable as possible.. Thinner, lighter high-index lenses are especially recommended if you have a strong prescription but high-index lenses can make your spectacles noticeably slimmer, lighter and more attractive regardless of how strong your prescription is. The main disadvantage of high index lenses would be the price point. Your email address will not be published. Polycarbonate Lenses Advantages & Disadvantages. 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. Higher cost; Abbe value; More brittle and reflective; Perhaps the most … So, they are the idea choices for people with strong prescription. Trivex is a material developed for military purposes. You don’t need to pursue additional coatings. Your email address will not be published. Due to the chemical makeup of the material from which they are created, high index lenses have more refractive power than standard plastic or glass. We offer a few different indexes on our lenses. They're lightweight and stylish, but are mostly reserved for those with higher vision correction needs. If you want to get high index lens, you can ask the optician to add an anti-reflective coating to the lenses. • Very high index – 1.74 to above. Not surprisingly, much of this added expense is passed along to you, the consumer. Shopping for eyeglasses can be complex. Disadvantages of Double Aspheric Lenses. And when the subject is eyeglasses, weight and thickness can mean a lot. Deciding which you should get depends on … High Index Material Disadvantages. Save my name, email, and website in this browser for the next time I comment. Thinnest lenses for high prescription. 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. 16 The “Abbe Value” is a measurement of lens distortion. And because AR coating virtually eliminates lens reflections, it makes high-index … It is used to make rimless glasses, and also for prescription sunglasses. Lenses with an index of refraction of 1.70 or higher typically are at least 50 percent thinner than conventional plastic lenses. More Reflective 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. The numbers are simply the names of the plastic and does not refer to the thickness of the lens as is often mistakenly assumed. These disadvantages are as follows: Less availability. 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