Wow, it does seem to be mostly hipe. It's marketed as having the clarity of glass when really it is not even better then Trivex! I guess I will go with CR39. Anyone have a brand preference for the highest quality? Thanks!
On Jul 18, 2:15 am, Paul <[email protected]> wrote: > 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 -~----------~----~----~----~------~----~------~--~---
