Does the UV protection in sunglasses wear out?

Saturday, March 14th, 2009

I've been wearing the same pair for a few years now. Wondering if the UV protection has an expiration date. Thanks.Dylan

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How do sunglasses protect your eyes from harmful sun rays?

Monday, February 16th, 2009

I am interested in finding out how the UV protection works. What materials block UV it and how they do it.Quinn

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