frespkr wrote: > > I wanted polycarbonate lenses, a real anti- > glare finish and not very high index for under $100. Believe it or > not , that wasn't so easy to find.
As far as I know, all polycarbonate has the same index of refraction-- about 1.58. From an optical standpoint, PC is probably the worst material commonly used in lenses, with a lousy Abbe number along with a so-so refractive index. It's good armor for your eyes, but not so good as a lens. Yet because of alarmist marketing of this substandard optical material, hardly anyone will dispense real glass lenses anymore-- when optically, that's the good stuff. Anyway, there is no point in having an opinion about refractive index once you decide on polycarbonate lenses, because there is no variation in the index of PC. Chalo --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
