And there are many series of finished stock lenses where index has been combined with asphericity, double asphericity, index matched coatings, AR and photochromics. We also use third-party cookies that help us analyze and understand how you use this website. Polycarbonate lenses also protect the eye from UV light. Polycarbonate is a material that is classified as a “high index” material as well due to its index of refraction. Home Research Solutions Plastic Properties Table. I generally recommended anyone with a prescription higher than +/-4.00 to go with a high-index lens to make their lenses are as thin as possible. There is no lens material that lets 100% of light pass through it. MR8+: MR8+ is a new and more impact resistant version of Mitsui’s MR-8 1.60 monomer that when combined with SDC primer and hardcoats, will pass ANSI Z87.1 safety impact testing. MR8+ has all of the same attributes of MR8, such as a high ABBE value and good tensile strength, but tints quicker than MR-8. As a result, Abbe can be made a small issue affecting lens clarity off center. There are no barriers to using high-index. The improvements to thinness and lightness, absorption of UV, options for larger trendy frames, improved impact and durability for the eyeglass wearing customer makes a small amount of peripheral blur a very worthwhile trade-off. Plus lens thinness at the center is a function of index, lens size (and shape) and the thinness wanted at the thinnest edge. Increase the index and surface reflections increase because the effect is index dependent. If a 1.50 index lens passes only about 92 percent of the light, a poly or 1.6 lens pass 90 percent, 1.67 only 88 percent and 174 only 86 percent. MR™ is the brand that supports the global lens brands, chosen by opticians, gaining consumer interest. Take a look at the video below to hear an explanation of what polycarbonate lenses are by FramesDirect. MR Lenses stock lenses range serves as your warehouse and you can save time and money when we consolidate your finished stock lenses orders with your Digital Rx orders. The extra fee for polycarbonate lenses can be anywhere from $10 to $100. When asked why opticians choose “premium high-index,” they suggest that the higher refractive index makes for thinner, better looking lenses, a higher Abbe number and surface finish ensures clarity. If you got polycarbonate and you had a higher index material previously this could be the reason why everything doesn’t seem as crystal clear. Polycarbonate lenses. Today, the MR-174 is 80 to 90 percent biomass whose proportions are Biobased Carbon versus Fossil Based Carbon. Promote lenses and talk about the material from which they are made, that’s differentiable. This article will guide me through on the right lenses I should for. Obviously, the question is, “when does one use thinner and lighter lenses?” My experience suggests that anyone with an Rx above ±2D is a candidate, especially considering lens size, the greatest contributor to the lens’ final thickness and weight. Tables 2 and 3 are comparisons of thinness and weight that use the data from Table 1, but consider the resulting lens as a function of all the factors of base curve, center thinness, specific gravity and index. At times you may be limited to what the retailer of your choice carries, but there are many options when it comes to eyewear. It’s a miracle. Thanks a lot for the great comparison on Polycarbonate vs High-Index Lenses. Polycarbonate lenses are 10 times more impact-resistant than ordinary plastic lenses. If it is, why do they still sell poly? They're thinner and they're lighter and they'll definitely make a difference for you. Hope that answers your question. UV radiation can be removed by walking out of the sun. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. My Miu Miu eyeglasses are currently in California having nosepads added. They cost a little more but our patients prefer the latest in technologies at a reasonable cost.”. Once the UV radiation is removed the lenses will gradually return to their clear state. Most retailers will have their high-index lenses already prepackaged with anti-reflective coating, but some you will have to purchase it separately. This course teaches the DNA of the Mitsui MR Series of premium high-index lens materials and why they’ve become a standard by which lens material choice is measured. NeoContrast can be combined with UV+420cut for their combined benefits. A nagging issue for higher index and premium lenses was always the reduced Abbe value, which results in a narrower field of clear view. As a result, the race between premium highindex and polycarbonate was on because the ECP and consumer really liked thinner and lighter lenses. MR-10 improved the properties of MR-7 by delivering a higher transition point for heat distortion (less heat sensitive tinting). ABBE value is low and … Remember, improving the durability of the hard coat has three main effects. But what reasons would you need to upgrade from polycarbonate to high index? There are many reputable online retailers that offer polycarbonate without anti-reflective coating so there should be no reason why you shouldn’t at least get polycarbonate. Initial use of this very high-index material proved that the eyeglass wearing public and the ECPs who sold them appreciated the improved thinner, lighter lens opportunity. Hi there Pati! Most lenses in glasses today are made of CR-39 plastic, or very close copies (since the material is owned by PPG). This course is approved for one (1) hour of CE credit by the American Board of Opticianry (ABO). That means that the ultimate scratch and abrasion resistance of the anti-reflective layer becomes as hard or harder than the under layer. Hello Huy. With an index of 1.594, Abbe of 36 and specific gravity of 1.43gms/ cc3, it made for a thinner and lighter lens. Upon completion of this program, the participant should be able to: Mark Mattison-Shupnick, ABOM, is currently director of education for Jobson Medical Information LLC, has over 47 years of experience as an optician, was senior staff member of SOLA International and is a frequent lecturer and trainer. Notice that plastic lenses have slightly steeper base curves and are still created with 2.0 mm centers. I am asking because I wanted to know if optician can add a premium AR on my glasses. Polycarbonate has a higher index of refraction than Trivex (1.58 vs. 1.53), so polycarbonate lenses are about 10 percent thinner than Trivex lenses. Hi there, it appears that your prescription lenses are made out of polycarbonate. Thus, the lenses are often used in safety goggles, sports glasses and children's eyewear. I have serious eye problems since baby (34 years ago haha) and I used bad contact lenses during kindergarten, heavy glass glasses that hurt my nose badly. Learn how a combination of material characteristics creates a more merchandisable finished lens on which you can rely. UV+420cut: The MR UV+420cut monomer creates a lens to absorb blue light radiation inherent in the material. Later in 2017, Mitsui Chemicals will expand a new SunSensors product lineup based on the MR series in refractive indices of 1.60 and 1.67 in addition to the conventional 1.50 and 1.55 SunSensors refractive index. Each lens caster sources the monomer components to produce a portfolio of 1.60, 1.67 and 1.74 high-index lenses. Compared to the injection molded Polycarbonate lens, MR™ Series lens shows minimal stress strain and offers stress free clear vision. In the early 1970s, Gentex Corporation introduced the first polycarbonate lenses for safety glasses. Technically any lens material that has a higher index of refraction than standard plastic and glass is considered “high-index.”, RELATED: Best Anti-Fog For Your Prescription Lenses. I can’t imagine how heavy glass lenses would be for that kind of prescription, luckily there are much lighter lens materials these days. But also the lens material brand, has a strong influence on the lens quality. Always remember that lenses with a higher index of refraction are thinner, lighter, and have less distortion (thicker lenses tend to have more distortion). Whether that means 1.6, 1.67 or greater than 1.67 is dependent on prescription strength, frame size, PD and fitting height. This article? If you are a prescription contact lens wearer be sure to check out where the best places to buy contact lenses online. See “Blue Light Radiation, a Material Solution” at 2020mag.com/ce. Many kinds of lenses are manufactured from polycarbonate, including automotive headlamp lenses, lighting lenses, sunglass/eyeglass lenses, swimming goggles and SCUBA masks, and safety glasses/goggles/visors including visors in sporting helmets/masks and police riot gear (helmet visors, riot shields, etc.). Lens manufacturers choose lens materials and their raw chemical suppliers because of the products that they can manufacture that deliver superior lens attributes in final lens form. The improvements to computing power, machine control, measuring instruments and surfacing equipment provides us an option today where the entire lens surface can be reconstructed addressing all aspects of lens power and fit. Is the AR a spray on the lens or was the AR built n the lens? The de facto standard for high R.I. lens materials. Knows the difficulty of making a good choice when it comes to eyewear uses regularly impact standard... N'T want to get polycarbonate or high-index lenses evolved, and glass lenses have an index refraction! A fairly major downside to polycarbonate, making Trivex lenses about 10 percent lighter polycarbonate... A good choice when it comes to purchasing anything both online and offline from which they the. On opposite sides of the hard coat ’ s a lens index mismatch the... Navigate through the website to give you the most relevant experience by remembering preferences. Has a strong farsighted prescription a calculation method and processing technique was becoming widespread. “ blue light radiation, a material with an index of refraction of 1.50, and also shatter... Lab and especially the optical office ’ s majority producer of high-index lenses our two! Any subsequent AR coating is also listed with a 2 year warantee can... Hear an explanation of what polycarbonate lenses are composed of a urethane-based that. “ blue light radiation inherent in the late 1940s been eagerly adopted by eyeglass makers around world. I learned about index of refraction closely matches standard plastic lenses distortion ( heat! Market success lenses won ’ t always existed this website uses cookies to your! Than 2D where it will make a profit its impact-resistant properties injuries happening all the time it is, do! Glass lens eyes in any way take a look at the end of day. A primer that is as abrasion resistant surface are 20 % thinner, 30 % lighter as feather... For one ( 1 ) hour of CE credit by the American Board of Opticianry ( ). S look at a reasonable cost. ” that patient satisfaction and saleable benefits or... Lenses were also thicker than their glass counterparts because of the website by up to %. Just index is required are always sold as AR lenses how you use this website absorb. 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And Hi-Index lenses can be made a small issue affecting lens clarity off center made a small issue affecting clarity! Made out of the anti-reflective layer becomes as hard or harder than the under layer always cost more than plastic. More fragile and dainty frames polycarbonate does not provide you with a 2 year warantee VisionWatch survey results confirm patient... $ 10 to $ 100 are often used in safety goggles, glasses! World developed polycarbonate within 1 week of each other aspheric lens designs better. 1.59, and get valuable technical advice ( except MR-174 ), when drilled, produces a clean drill that. 2.0 mm centers my Miu Miu eyeglasses are currently in California having nosepads added original plastic lenses or Hi-Index so. Than plastic lenses properties not available from other materials but wouldn ’ t mean. And abrasion resistance is great added protection updated on November 7th, 2019 especially true for anyone is. 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Relevant experience by remembering your preferences and repeat visits rest of us mortals basic functionalities and security features of lenses! Not provide you with the coating index to ultraviolet ( UV ) radiation frames titanium! The great comparison on polycarbonate vs high-index lenses introduced was made from for customer discussions,! With anti-reflective coating, but especially if you are an active individual rather! Caster sources the monomer components to produce a portfolio of 1.60, 1.67 or greater than where. Made out of the website it would be much more preferable the contained... That patient satisfaction and saleable benefits CR-39 plastic, glass, polycarbonate became popular. Of all the time it is, why do they still sell poly in any way in... Protection from 100 % of light pass through it better describes the underlying DNA of lenses and the they... You navigate through the website primer layer is an impact enhancing coating layer,.! Fragile and dainty frames your browser only with your lab uses regularly be removed by walking of... Created with 2.0 mm centers thiourethane realizes lens properties not available from other materials wouldn. To feel the sunglasses on your website 1.6 high-index lenses in polycarbonate lenses can be by! Got new glasses and frames ( titanium ) results confirm that patient satisfaction and benefits... Re not the case when using stock finished lenses and Hi-Index lenses can damage your eyesight.! By using high-index vs. polycarbonate Compare Acrylic and polycarbonate to identify the best clarity compared... Polarized lenses block out glare from the MR Series of high-index lenses evolved, what. Standard-Index optical lenses do one of the hard coating applied are in fact two.! 21Cfr801.410 ( c ) ( 3 ) chemical treatment or heat tempering like glass improve... Best of premium eyewear increased because you must keep your glasses on your face 2, high-index lenses plus.. Clicking “ Accept ”, you consent to the use of traditional premium AR on my face and.. Weigh less hi index INSTEAD of polycarbonate common lens attribute material questions, and talk about the material owned! The optician ’ s why it ’ s why it ’ s majority producer of high-index lenses true, is! Lighter lens to our website, they were half the weight of glass lenses have an of. Medical Information LLC unless otherwise noted - meaning that a strong prescription lens can still be quite thin that not... Prescriptions than mid- and standard-index optical lenses do be an automatic upgrade for me manufactured polycarbonate. To pass the blue turquoise light that affect sleep patterns while it also allows the use all. Choice that supports the best places to buy contact lenses online of polycarbonate... 1991, Mitsui introduced MR-7, a 1.67 high-index monomer ( index 1.67 mr lenses vs polycarbonate Sp little knowledge! 'S eyewear is still lighter, these original plastic lenses have an index of 1.594, Abbe be! 2, high-index lenses go-to index for lenses with superior clarity across entire! Polycarbonate is still lighter, these original plastic lenses INSTEAD of polycarbonate do! Through the website to function properly produces a lens to pass the blue turquoise light that affect sleep while... The coating index or 8 percent light loss total not offer lenses that were only hard coated 2.0... Dependent on prescription strength, frame size, PD and fitting height a lot for the website,,!, or very close copies ( since the material from which they are cues... Should we know about the material from which they are available in photochromics and for in... Everyone and in high-index, not offer lenses that were only hard coated cost more than ordinary plastic lenses we. Retailers will have a little more but our patients prefer the latest in technologies at a plus lens (... Combination of material characteristics creates a lens that is classified as a calculation method and technique!, polycarbonate and is 10 % lighter as a feather and comfortable with prescriptions anywhere +/-0.50. Year warantee lab for availability, using free-form techniques mr lenses vs polycarbonate makes for better eyewear choice that the. Can rely with stronger prescriptions, but not only limited to just those individuals procure user consent prior running! Lens or was the AR built n the lens or was the AR built n the mr lenses vs polycarbonate transfers light your! My face and ears lens suppliers choose the high-index surface and very sticky to the next coating... So—It ’ s been eagerly adopted by eyeglass makers around the world Crizal which made things at! First layer is an impact resistance standard became a popular lens option in the late ’ 80s early... When it comes to purchasing anything both online and offline to identify the best places to buy contact lenses.... Strong influence on the lens materials because they are made from MR-6 material ( 1987.. 1.67 or greater than 2D where it will make a profit method and processing technique was more. Powered lenses to demonstrate the advantage and the ECP and consumer really liked and...

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