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What is the difference between Polycarbonate and CR-39 lenses?

April 26, 2017cr-39 difference lenses polycarbonate

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What is the difference between Polycarbonate and CR-39 lenses?

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CR-39 is an optical monomer used in casting plastic lenses for prescription eyewear. CR-39 lenses are light weight compared to glass, and can be made in just about any prescription. However, they are not recommended for active sports and motorcycling, due to the fact that they are not impact resistant and require additional UV and scratch coatings. SportRx, Inc strongly recommends upgrading to polycarbonate lenses over CR-39 lenses due to its impact resistance and scratch resistance. Polycarbonate is also lighter weight and has 100% UV protection.