Despite what they say, I don't think Goggles4U uses true CR-39 in any of their lenses. CR-39 has an index of 1.5 (or 1.49), and the lowest index they list is 1.56: http://www.goggles4u.com/price.asp --~--~---------~--~----~------------~-------~--~----~ Check us out at the oft-updated http://glassyeyes.blogspot.com!
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