Polarized lenses make it difficult to view LCD screens. Here is a brief comparison of polycarbonate and Trivex lenses to help you decide which lenses might be best for you: 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. First of all, they are so durable that they are hard to get shattered even in the roughest conditions. First things first, I would like to apologize for my extended absence. Here's what to look for, Guide to buying the best sunglasses for kids, Teens: Choosing sunglasses for a teenage boy or girl, Understanding how to read a contact lens prescription, How to use, put in and remove contact lenses, Lens care: Cleaning, disinfection and storage, LASIK eye surgery recovery & healing time expectations, 8 tips to reduce cataract surgery recovery time, LASIK procedure: A guide for what to expect, Eye and visual acuity tests and the Jaeger eye chart, Preparing for an eye exam: What to expect, Colour blindness tests and types of colour blindness, Macular degeneration: How to cut your risk, How to boost your diet to protect ageing eyes, Ageing eyes: Signs of eye problems in elderly, Red eyes in photos: How to get rid of the red-eye effect, Applying eye drops: A guide on how to put in eye drops. November 14, 2017 November 14, 2017 / The Optical Jedi. Disadvantages of polycarbonate lenses. The lower weight allowed eyeglass makers to experiment with larger size lenses, since CR39 is much lighter in weight. Specialty eyewear: Work, driving and safety glasses, Reading glasses: What to know before buying, No-line multifocal progressive lenses for a younger you, Polycarbonate lenses: Advantages and disadvantages, Best places to buy eyeglasses/where to buy, Kids’ glasses: 10 tips for buying children’s eyewear, How to find great glasses at a bargain price, How to choose the best glasses for your face shape, Glasses that suit your personality and lifestyle, Performance sports sunglasses: See better, play better, Best sunglasses for ultraviolet (UV) eye protection, Prescription sunglasses: A guide to the best lenses, Facts about sunglasses: A FAQ and buying guide, Polarised sunglasses: Best for reducing glare, Designer and fashion sunglasses: Look like a celebrity, Non-prescription sunglasses: What to know before buying, Buying kids' sunglasses? The biggest disadvantage is their high price. When you are wearing glasses that have polarized lenses, then the chemical agents added to the product to create the filtering mechanism reduce the amount of light your eyes process from an LCD screen. 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. Its superiority doesn’t mean polycarbonate lenses don’t provide a clear picture — just that glass offers more clarity. They also have good UV protection and a higher refractive index than CR39. High price is one of the major disadvantages of polycarbonates. 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. 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