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Does having any plastic between your eyes and the environment automatically provide UVA and UVB protection? Or do the lenses actually have to be coated (or be comprised of a special type of plastic) in order to afford UVA and UVB protection?

This question is partially prompted by a shirt that I bought that prominently advertises its high level of UV protection. Well, even the least expensive t-shirt seems to provide good protection.

  • Glass blocks UV light. So I think it's better to buy cheap glass glasses than the plastic ones. – user2824371 Nov 20 '17 at 20:47
  • @user2824371 I dare you to find a cheap pair of sunglasses with glass lenses. – Carey Gregory Nov 21 '17 at 1:59
  • @Carey Geogory Well, it exists in Egypt but I'm not sure about the quality of the glass. I feel like it's a material between glass and plastic. It's more like a glass. – user2824371 Nov 21 '17 at 17:24
  • I haven't seen a pair of sunglasses with glass lenses in many years. I wouldn't be so sure those glasses you describe have glass lenses. – Carey Gregory Nov 22 '17 at 0:31

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