It is known that polycarbonate lenses have a little bit of distortion at the edges because of the material and the production process. Polycarbonate lenses get a lot of press because they’re great for several specific uses, but let’s not discount the value of sleek, slender, and clear 1.67’s. While it’s fair to say that it’s important to invest in quality eyewear, we are well aware that price can be a critical factor when purchasing any product, including glasses. Disadvantages—you'll want to add a scratch-resistant lens treatment for durability and an anti-reflective (AR) treatment, too. 1. PVC is durable as well as can be … POlycarbonate is more impact resistant, great on children, and less likely to chip on the edges. Polycarbonate Lenses. The higher the ABBE value, the clearer the lens. ... Polycarbonate lenses provide both higher impact resistance and 100% UV protection naturally, taking care of the two main safety concerns when shooting outdoors. It is similar to polycarbonate, but it has some distinct advantages. If you’re sensitive to your frame’s weight, for example, polycarbonate lenses … Photochromic lenses can be worn throughout the day on the daily basis. These lenses have good impact resistance, making them ideal for children, sports and industrial work. Advantages of Polycarbonate Lenses: Greater Protection: Polycarbonate lenses do not break or shatter easily into harmful pieces on impact. Polycarbonate may not be the wrong choice, but your lenses will be thicker. Because of its impact resistance, polycarbonate is a favorable choice for protection from extreme weather, flying debris, or vandalism. Next, polycarbonate lenses are hard to get scratched. Different kind of lens is prescribed to different people depending on the difficulties faced by them. They also have good UV protection and a higher refractive index than CR39. These are thinner and lighter than the traditional eyeglass frames. Cons (Disadvantages) Polycarbonate is recommended only for those products that are used once, not repeated because of its chemical makeup. 5. Polarized lenses make it difficult to view LCD screens. Light transmission. Polycarbonate lenses have a higher index of refraction (1.586) than CR-39 plastic (1.498) and are therefore thinner in an equal lens prescription. Polycarbonate is more common in different lens designs than Trivex. This distortion is noticeable at higher diopters and specially at the periphery of the lens. This durable and practical roofing material is perfect for conservatories, patios, and deck areas, but it’s not practical to cover the entire roof of a house. While polycarbonate blocks 100 percent of UV rays, glass requires a UV protective coating. It’s a requirement in North America for children to be in impact resistant materials. This identifies the lenses' tendency to disperse white light into its separate colors. Disadvantages: At least twice the weight of plastic or polycarbonate lenses. Like CR-39, polycarbonate has been a popular choice for decades. They can be used just like normal eyeglasses. There is more distortion away from the optical center. List of the Disadvantages of Polarized Lenses. WHO SHOULD USE THESE LENSES? Disadvantages of Glass Lenses. Polycarbonate lenses are made by injection moulding. Polycarbonate or Trivex are the most protective eyeglass frmaes. Also many people compare the cost of polycarbonate product with ABS or Acrylonitrile Butadiene Styrene, which is very tough in its nature but low in terms of cost. The cost of polycarbonate panels is very high compared to glass, plastic or other similar material. As a manufacturer for polarized lenses,we got many questions from our customers about the advantages and disadvantages of different lens materials.Below are … I am going to take a different approach to answering your question and assume you meant eyewear lenses. Unlike glass, the structures that use polycarbonate can be shaped like domes, igloos and many other fancy shapes that add a design feature to the building. Advantages and Disadvantages of Polycarbonate Lenses. Polycarbonate, otherwise known as its trademarked name, Lexan, is a group of thermoplastic polymers. Polycarbonate lenses come with a scratch resistant coating (not scratch proof) at no additional charge. Photochromic lenses are available in Trivex as well. Polycarbonate or Trivex lenses are great if you, or a kid, plays sports. Can shatter or chip easier than lenses made of other materials. They are used very much in the modern chemistry industry because they can be very easy worked and molded into different shapes and they can also be thermoformed. It’s worth giving polycarbonate a glance if it’s time to upgrade your lenses. About 25 to 40 percent thicker than polycarbonate and high index plastic lenses. Polycarbonate lenses advantages and disadvantages. Polycarbonate lenses are a version of plastic lenses that provide impact and scratch resistance. CR-39 Plastic vs. Glass Lenses. Table of Contents. The other answer appears to relate to cameras, so dependent on your intention …. First of all, they are so durable that they are hard to get shattered even in the roughest conditions. They show great capacities for temperature resistance, impact resistance as well as for… **Standard optical plastic has an ABBE value of 58. +91-9711115191 [email protected] om Doctors and dispensers used to the pristine clarity of plastic and glass lenses refused to accept the little black particles in the lenses. Although Trivex lenses provide an almost endless list of advantages, there are some downsides. These lenses are either made up of plastic, glass, or polycarbonate. Disadvantages: – Polycarbonate lenses are more expensive than standard plastic lenses. These are the two most popular forms of glasses currently on the market. However, thinner lenses won’t … Lens materials affect thickness and weight. Polycarbonate: This material is 10 times more impact-resistant than plastic, thinner than plastic/glass, and lighter than plastic, and it blocks 100% of UV rays. Any coatings added to lenses have the potential to scratch. Quality sunglasses that block UV rays also consist of polycarbonate lenses, making them high impact resistant. Polycarbonate, being so strong and flexible, helps the structures it is used in to be more creatively designed. Clarity: A lens that’s optically clearer provides a better picture. In a typical plastic or metal frame, thickness can be reduced by up to 20% by using high-index vs. polycarbonate lenses. The first polycarbonate lenses had minute black carbon particles embedded inside the lenses. This makes polycarbonate use in food-related applications potentially hazardous. Disadvantages: Polycarbonate is susceptible to scratches and requires a scratch-resistant coating for durability. This is called chromatic aberration, and it is a main source of blur in a lens. Disadvantages of Polycarbonate. Of course, there has to be a reason why plastic lenses got so popular in the first place. However, certain Polycarbonate/ABS blends are also used at times for 3D printing on an FDM machine. A new, brand-name type of lightweight and resistant plastic has hit shelves: Trivex. (Watch a man take a hammer to a polycarbonate skylight in this video.) Glass is superior in this category, which is why binoculars, telescopes, and cameras use it. Disadvantages of polycarbonate lenses: 1. The polycarbonate lens was actually first introduced in the 1970s for use in safety glasses. Disadvantages of polycarbonate lenses. We can say high price is one of the biggest disadvantages of polycarbonate panel. Material contact of certain types of polycarbonate with water can lead to a process called hydrolysis where Bisphenol A is released. Disadvantages of Trivex Lenses . So, higher the diopters and bigger the frame, more distortions. Disadvantages include the fact that their abrasion resistance is poor - adding an anti-scratch coating can help but reduces the impact resistance slightly. These types of lenses cannot be tinted easily. Brown lenses are effective in bright light conditions or when the day is slightly cloudy. This enables the polycarbonate factors to last in the outdoors for many years without showing signs of fading, yellowing or discoloration. The unfortunate side to polycarbonate is that because of its chemical makeup and property, it is recommended only for those products that are used once, not repeatedly. Polycarbonate is 250 times stronger than glass and is virtually indestructible. And then polycarbonate lenses eyeglasses are much lighter than glass or plastic glasses, which make them more comfortable to wear. Polycarbonate lenses are a type of plastic lens, but not exactly standard plastic. 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