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. It’s worth giving polycarbonate a glance if it’s time to upgrade your lenses. High-quality polycarbonate lenses are not the cheapest option on the market. High index plastic tends to have a greater visual clarity and, of course, a thinner profile than polycarbonate which only has a 1.59 index. Both can offer UV protection, though. About 25 to 40 percent thicker than polycarbonate and high index plastic lenses. Polycarbonate lenses eyeglasses have many advantages. Because of its impact resistance, polycarbonate is a favorable choice for protection from extreme weather, flying debris, or vandalism. 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. Photochromic lenses are available in Trivex as well. Polycarbonate is more common in different lens designs than Trivex. Polycarbonate is a high index material, so the lenses will be thinner than if made with glass or plastic. Polycarbonate lenses are a version of plastic lenses that provide impact and scratch resistance. Polycarbonate factors are resistant to sunlight, rain and snow. These are the two most popular forms of glasses currently on the market. Disadvantages: At least twice the weight of plastic or polycarbonate lenses. In contrast to a normal roofing covered with asphalt shingles, a corrugated steel roof can last as much as 3 times as long as asphalt, or 25 to 60 years. This is called chromatic aberration, and it is a main source of blur in a lens. They show great capacities for temperature resistance, impact resistance as well as for… 1. Choosing the lens for your frames relies on you. Any coatings added to lenses have the potential to scratch. It is similar to polycarbonate, but it has some distinct advantages. Polycarbonate lenses are a type of plastic lens, but not exactly standard plastic. They can be used just like normal eyeglasses. First of all, they are so durable that they are hard to get shattered even in the roughest conditions. Polycarbonate may not be the wrong choice, but your lenses will be thicker. ... Polycarbonate lenses provide both higher impact resistance and 100% UV protection naturally, taking care of the two main safety concerns when shooting outdoors. Polycarbonate Lenses. These disadvantages are as follows: Less availability. Polycarbonate lenses are made by injection moulding. Quality sunglasses that block UV rays also consist of polycarbonate lenses, making them high impact resistant. However, thinner lenses won’t … 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. Photochromic lenses can be worn throughout the day on the daily basis. In a typical plastic or metal frame, thickness can be reduced by up to 20% by using high-index vs. polycarbonate lenses. And then polycarbonate lenses eyeglasses are much lighter than glass or plastic glasses, which make them more comfortable to wear. Polycarbonate, being so strong and flexible, helps the structures it is used in to be more creatively designed. While polycarbonate blocks 100 percent of UV rays, glass requires a UV protective coating. Next, polycarbonate lenses are hard to get scratched. Disadvantages of polycarbonate lenses. However, certain Polycarbonate/ABS blends are also used at times for 3D printing on an FDM machine. These lenses have good impact resistance, making them ideal for children, sports and industrial work. 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 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. This enables the polycarbonate factors to last in the outdoors for many years without showing signs of fading, yellowing or discoloration. Each lens offers advantages and disadvantages. Advantages and Disadvantages of Polycarbonate Lenses. Or, if you have any condition where you see better out of one eye, these can help protect your "good" eye. WHO SHOULD USE THESE LENSES? Disadvantages of Glass Lenses. What are the advantages and negative aspects of polycarbonate phenomenon lenses? Disadvantages of Trivex Lenses . 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. Rainbows may be pretty in nature, but they are a problem optically. The Advantages and Disadvantages of Polycarbonate Roofing Polycarbonate is a strong thermoplastic material that is lightweight and can withstand extremely low and high temperatures. The higher the ABBE value, the clearer the lens. These lenses are either made up of plastic, glass, or polycarbonate. With a higher index (of refraction), light is bent more efficiently, therefore it requires less material to achieve the eyeglass prescription making the lenses … Advantages of Polycarbonate Lenses: Greater Protection: Polycarbonate lenses do not break or shatter easily into harmful pieces on impact. Green lenses can offer a superior level of filtering help when you find yourself in conditions with extreme glare. These are thinner and lighter than the traditional eyeglass frames. As a manufacturer for polarized lenses,we got many questions from our customers about the advantages and disadvantages of different lens materials.Below are … Disadvantages—you'll want to add a scratch-resistant lens treatment for durability and an anti-reflective (AR) treatment, too. Light transmission. Polycarbonate, otherwise known as its trademarked name, Lexan, is a group of thermoplastic polymers. PVC is durable as well as can be … So, higher the diopters and bigger the frame, more distortions. The first polycarbonate lenses had minute black carbon particles embedded inside the lenses. Polycarbonate lenses come with a scratch resistant coating (not scratch proof) at no additional charge. It is known that polycarbonate lenses have a little bit of distortion at the edges because of the material and the production process. Like CR-39, polycarbonate has been a popular choice for decades. Not enough thinness. 5. Polycarbonate lenses advantages and disadvantages. Disadvantages: Polycarbonate is susceptible to scratches and requires a scratch-resistant coating for durability. Different kind of lens is prescribed to different people depending on the difficulties faced by them. Of course, there has to be a reason why plastic lenses got so popular in the first place. Clarity: A lens that’s optically clearer provides a better picture. If you’re sensitive to your frame’s weight, for example, polycarbonate lenses … Lens materials affect thickness and weight. The other answer appears to relate to cameras, so dependent on your intention …. Polarized lenses make it difficult to view LCD screens. 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. 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. They have good impact resistance and are therefore ideal for children, sports and industrial purposes. This distortion is noticeable at higher diopters and specially at the periphery of the lens. 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.) This makes polycarbonate use in food-related applications potentially hazardous. We can say high price is one of the biggest disadvantages of polycarbonate panel. Plants that were using polycarbonate lenses for safety glasses didn’t care about the tiny black particles. Can shatter or chip easier than lenses made of other materials. Brown lenses are effective in bright light conditions or when the day is slightly cloudy. Another advantage is the fact it can be injected into various objects which allows it to be used for discs, bottles, glasses, lenses, audio player cases, and lab equipment. Property of resistance. Disadvantages: – Polycarbonate lenses are more expensive than standard plastic lenses. This identifies the lenses' tendency to disperse white light into its separate colors. Doctors and dispensers used to the pristine clarity of plastic and glass lenses refused to accept the little black particles in the lenses. Glass is superior in this category, which is why binoculars, telescopes, and cameras use it. POlycarbonate is more impact resistant, great on children, and less likely to chip on the edges. I am going to take a different approach to answering your question and assume you meant eyewear lenses. Table of Contents. 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. Glass lenses do have some disadvantages as … Cons (Disadvantages) Polycarbonate is recommended only for those products that are used once, not repeated because of its chemical makeup. List of the Disadvantages of Polarized Lenses. Their high impact resistance provides greater protection from eye damage or injury due to broken or shattered eyeglass lenses. There is more distortion away from the optical center. Disadvantages of polycarbonate lenses: 1. They also have good UV protection and a higher refractive index than CR39. Although a great option for most people, a small percentage of the population complains that they do not see as clearly through polycarbonate lenses. Although Trivex lenses provide an almost endless list of advantages, there are some downsides. It’s a requirement in North America for children to be in impact resistant materials. The cost of polycarbonate panels is very high compared to glass, plastic or other similar material. 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. The disadvantages of polycarbonate lenses include the fact that their abrasion resistance is poor, but when an anti scratch coating is added to this the impact resistance is reduced slightly. +91-9711115191 [email protected] om Polycarbonate or Trivex are the most protective eyeglass frmaes. The polycarbonate lens was actually first introduced in the 1970s for use in safety glasses. Require a special coating to provide 100% UV protection. Material contact of certain types of polycarbonate with water can lead to a process called hydrolysis where Bisphenol A is released. Its superiority doesn’t mean polycarbonate lenses don’t provide a clear picture — just that glass offers more clarity. Disadvantages of Polycarbonate. Polycarbonate or Trivex lenses are great if you, or a kid, plays sports. CR-39 Plastic vs. Glass Lenses. **Standard optical plastic has an ABBE value of 58.