I had to look this up. There was a lot of marketing hype, but it looks like there's something really there, too. Here's one discussion, a little more than 1/3 of the way down the page: http://www.adseyewear.com/lensmat.php
Here's more info: http://www.pechoptical.com/content.asp?ID=68 >From what I could gather, SR91 is only available from the company that developed it, Kaenon, and it's only available polarized. Abbe values (higher is better): CR39 - 58 Trivex - 45 SR91 - 40 Polycarbonate - 30 Index of refraction (higher means thinner lenses): CR39 - 1.49 Trivex - 1.53 SR91 - 1.56 Polycarbonate - 1.59 More research would be needed to determine the advantages of SR91 over Trivex. If it's not available in clear lenses, though, the point may be moot. --~--~---------~--~----~------------~-------~--~----~ Check us out at the oft-updated http://glassyeyes.blogspot.com! You received this message because you are subscribed to the Google Groups "GlassyEyes" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/glassyeyes?hl=en -~----------~----~----~----~------~----~------~--~---
