Anything that meets ANSI Z87.1 is impact-resistant. High-impact resistant lenses bear the Z87.1+ mark. I don't think it's only polycarbonate that meets these standards?
http://docs.google.com/viewer?a=v&q=...AH0GEDgJVXEk-Q
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Thread: sunglasses?
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02-10-2010, 07:56 AM #1
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02-10-2010, 11:54 AM #2
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I have no idea of what materials meet those standards. My ophthalmologist always gives me a prescription for polycarbonate lenses for safety, though.
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02-10-2010, 12:23 PM #3
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Looks like for impact-resistant prescription lenses, it's either polycarbonate or Trivex. I'm guessing Trivex is probably a lot more expensive. It's supposed to be a lot better optically than polycarbonate.
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