I just bought 1 pair of glasses at Walmart and they hit me with 2 ea. Instead, PC is an acronym for the composite used to make the lens. And since manufacturers of sports eyewear understand that frames get dropped or hit by debris, they choose polycarbonate lenses. The top and bottom edges of both lens have many, very fine scratches. The best TAC Polarized Lens are those that block more than 99% of harmful UV rays with wavelengths up to 400 nanometers. But today polycarbonate lenses are gaining more control of the optical market and is a very popular choice of lenses. Copyright 2022 VisionCenter.org. Polycarbonate lenses are about 10% thinner than Trivex lenses. Nylon lenses are what you would find in the cheapest low end sunglasses. Now I will be adding lense material to the list. Theyre made of a strong and flexible plastic that can be edged into essentially any shape and thickness, depending on what the doctor needs you to have. ","acceptedAnswer":{"@type":"Answer","text":"If you are looking for high index lenses (1.74), you have to pay somewhat between $180 and $230. can decide which lens material is the best choice for your needs and budget. or Trivex lenses. If you go through them to make a purchase we will earn a commission at no extra cost to you but helps support our website. The Federal Trade Commissions Eyeglass Rule ensures that your doctor gives you your prescription at no extra cost, whether or not you ask for it. You can wear polycarbonate lenses with virtually any full-rim style. Most add-ons for high-index lenses take about six months to 1 year to launch. Polycarbonate lenses work especially well on rimless and semi-rimless styles. Let us know in the comments below! Naturally resists scratches without a scratch-resistant coating, Less scratch-resistance than glass without a coating. "}}]}, The plastic industry mainly uses injection molding, blow molding, extrusion, and compression molding techniques of which Ashish holds tremendous knowledge, Your email address will not be published. Thats because Polycarbonate flexes instead of shattering when hit by an object, whether its gravel, a ball, or an elbow. He covers everything within Plastics manufacturing and processing. Hi Diane, great question. The plastic material itself is very vulnerable to scratches and hard scratch-resistant coatings have been developed as a solution to this problem. Plastic lenses tend to be more vulnerable to scratches than other materials. Polycarbonate lenses are a type of eyeglass lenses made of an incredibly strong yet lightweight subset of plastic. They are also available in more styles of sunglasses that cannot use glass lenses. Polycarbonate is still lighter, and can be made in higher index - meaning that a strong prescription lens can still be quite thin. However, thinner lenses are not lighter in weight. When eye safety is a concern, polycarbonate or Trivex lenses usually are the best choice for your eyeglasses, sunglasses and sports eyewear. RELATED: Sunglasses for babies with polycarbonate lenses. "}},{"@type":"Question","name":"How much do high-index lenses cost? Today, even though glass lenses are thinner than they used to be, polycarbonate lenses are still the lighter choice. Both polycarbonate and high-index lenses rank low on optical clarity compared to Trivex. lifetime of good vision. Shu Kie is Mouqys certified optician with over 5 years of experience in the optical industry. Lauren completed a bachelor's degree in biopsychology from The College of New Jersey and non-degree graduate coursework in public health at Princeton University. It is also much less expensive to use than glass. Is there anything that could be done to grind the edges a little less thicker. The impact protection on polycarbonate is so good that both safety and sports eyewear use polycarbonate for their lenses. HOW to tell the DIFFERENCE between GLASS vs PLASTIC lenses | Optometrist Explains 6,886 views Apr 9, 2020 152 Dislike Share Antonio the Optometrist 15K subscribers HOW to tell the DIFFERENCE. 5750 Brittmoore RD Suite 300Houston Texas 77041. Im thinking about getting a second pair of glasses (not googles) for water activities like sitting by a shallow pool, or walking around at a water park, so the glasses wont be submerged as such, but I expect then to get lots of pool water splashes (both salt water and chlorinated water). Amevie is a Canadian lifestyle and sun-care brand that cares. {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Are high index lenses more expensive? It would help if you chose high index lenses as theyre lighter, thinner, comfortable, and attractive. In fact, polycarbonate is the same material used for bullet-proof glass due to its impact-resistant properties. Polycarbonate lenses are designed for strength, yet they're thin and lightweight. All About Vision does not provide medical advice, diagnosis or treatment. Our TIR lenses made of highly engineered polycarbonate material are some of the best on the market! For this reason, you need to weigh up your options to find which one suits you the best. Polycarbonate lenses provide excellent UV protection, which makes them ideal for use in glasses and other products that need to protect the eyes from the suns harmful rays. Keep in mind that we link these companies and their products because of their quality and not because of the commission we receive from your purchases. Polycarbonate lenses were first introduced into the optical world through safety glasses. Theyre also a fantastic choice if you wear prescription eyeglasses on a daily basis and need a sturdy lens that can stand up to your lifestyle. New frosted and unfrosted Acrylics provide diffusion levels from 92% to 60%. The second and third layer allows durability that resists harsh environments. Lets look at the pros and cons of polycarbonate lenses. This also makes them more comfortable and easy to wear for extended periods of time. Trivex lenses have a higher Abbe value and may produce sharper peripheral vision with less chromatic aberration than polycarbonate lenses. RELATED:How to clean your glasses the right way. Polycarbonate sunglasses are very susceptible to scratches. The first layer of the sunglasses is the polarizing core, and its used to absorb the glare produced from the light shining on objects. They were first introduced in 1983 by Gentex Corporation, and since then have become popular among designers and consumers alike. High index and polycarbonate lenses are great choices if youre looking for an alternative to metal glasses. Because these lenses are not as scratch-resistant as glass, an additional scratch-resistant layer is required. Also known as poly, this flexible plastic was designed for use in astronaut gear. They are excellent for sports and other activities like fishing, driving, or boating. Bottomline Benefits: Polycarbonate Vs High Index Lenses . Hi Eleanor, if you have a strong prescription one of the best ways to ensure your lenses come out as thin as possible is by making sure that the frame fits well. Sunlight scatters without direction and when it hits flat surfaces, the reflected light becomes polarized, in other words, it is less scattered and more aligned. Higher grade TAC lenses are available (effectively increasing the thickness of the layers) and these can be 1.6mm thick. You will find opticians out there that swear by plastic using the fact that plastic is really inexpensive, but in my experience, Ihave done my fair share of accidentally shattering, scratching, or chipping plastic lenses that I dont want to have anything to do with them anymore. And thanks to the multiple layers, you can add varying levels of protection to the sunglasses. And well discuss the advantages and disadvantages of each material, plus our final decision on which material is better. Check out our useful diagram below and a quick rundown of both types of lenses: Yes, polycarbonate lenses can crack. Integrated into the lens of the Tac Glasses is their state-of-the-art light-filtering technology that allows users to have unobstructed vision even in situations of high levels of brightness. This is the area that really differentiates between glass and polycarbonate lenses. Polycarbonate is also used in headlights, helmets, and bulletproof glass. Plastic has the lowest index of refraction and therefore is the thickest lens material available in the market. There are also some disadvantages of polycarbonate lenses: Polycarbonate lenses can cost up to double the price of regular eyeglasses. Important Factors to Consider While Choosing Lenses, Prescription Range is an Essential Factor, Thickness and Weight gets Affected by Lens Material. My receipt lists Plast 1.49 PANORMA IMPERIUM PLUS, so I guess that means plastic. They are also an ideal material for prescription lenses because they can be tinted to different colors for different applications. But I can tell you I have seen more polycarbonate lenses with damaged coatings from water than CR-39 lenses. Youre absolutely right! However, the added durability of the polycarbonate material means that these glasses should hold up much better for everyday use than your average plastic lenses. In general, high-index lenses are prescribed for strong prescriptions. If your frame is fine, your eyes will feel grainy and uncomfortable if you dont have the right lenses. Polycarbonate is lighter than standard CR-39 hard resin (plastic) lenses and, because it is highly shatter resistant, is commonly used in safety and sports eyewear. Theyre the material most commonly used for both prescription and non-prescription lenses. Vision Center is funded by our readers. A higher index of refraction also means denser material and therefore thinner lenses. JavaScript is disabled. And if you combine them with a lightweight frame material like titanium or nylon, youre set for a full day of comfortable wear. The arrival of the sun has us all excited and ready for some fun. Ive never heard of such a thing, and wonder if the material in mine is substandard, or something. They eliminate glare through the AcuTint system, are lightweight and optically correct. For this reason, the lens requires a scratch-resistant coating applied. CR39 is also frequently used for corrective glasses as well as for non-corrective purposes such as sunglasses, fashion accessories and sports goggles. Polycarbonate is an excellent choice for people with a strong prescription. playing sports while wearing an eyeglass frame that is not rated for I notice you say that plastic is cheaper. Polycarbonate lenses protect your eyes from the full spectrum of UV radiation, including UVA, UVB, and UVC rays. Additionally, plastic lenses are much less expensive than the other options. Oakley Ruby Iridium vs. Fire Iridium Lenses Whats the difference? Cost. Polycarbonate and Trivex lenses are much more impact-resistant than regular glass and plastic lenses (including other high-index lenses) because these lightweight lens materials are relatively "soft" which means they can absorb energy without lens fracturing. It may come down to what styles and brands you like typically use. The cost of polycarbonate and Trivex lenses can vary considerably, but many optical stores charge more for Trivex lenses than polycarbonate lenses. Some are known to go up to 9 layers, but theres no confirmation whether having nine layers is better than seven. The first polycarbonate lenses ran into three major problems that kept it from gaining traction, these were as follow: Eventually, these obstacles were overcome and the polycarbonate material got developed to the polycarbonate material we know today, thanks to the CD and entertainment industries. Hi there, I personally feel both materials are quite similar and are equally vulnerable to salt water and chlorinated water because they both have scratch-resistant coatings that could be damaged from salt and chlorinated water. Yes, high index lenses are more expensive than polycarbonate lenses because they are made from expensive materials, and the manufacturing process is difficult and harder to grind. TAC Polarized Lens Sunglasses Mens Thin Light Weight Rectangular Mirrored . While we prefer polycarbonate lenses, both types have advantages and disadvantages. Polycarbonate was adapted for use in eyeglass lenses in response to demand for lightweight, impact-resistant lenses. Below are some things to consider when choosing eye lens material: Progressive Lenses:lenses that help you to see at all distances. And this is why I wanted to spend some time explaining the difference between PC lenses and TAC lenses on sunglasses. Glass will always provide the best optical experience as glass refracts light much more efficiently than plastic. choosing a selection results in a full page refresh. That is all I wanted to say about High index vs polycarbonate lenses. The liquid polycarbonate is then rapidly injected into lens molds, compressed under high pressure, and cooled to form a finished lens product in a matter of minutes. Medicaid: Eligibility and Vision Benefits. 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