Especially given the "self destructing frames" thread that's current
on the forum, you may not want to hear this...but Zenni is well known
for their optical quality. Their frames range from exceptional to
junky, but their optical quality is always top notch. Dead on the
prescription, and super-clear...definitely not the stuff you think of
when you hear "poly."
Try an $8 pair, and see if they meet your expectations. From my own
experience, and that of many others on this forum, it's hard to go
wrong with their full-rim frames, and my own experience with their
half rim frames has been great. Never tried the rimless, though.
-- Chuck Knight
On Sun, Dec 20, 2009 at 3:40 PM, Paul <[email protected]> wrote:
> CR39 has an index of 1.49, which is sometimes rounded up to 1.50. A
> lens with an index of 1.56 may be made from a material very similar
> but not identical to CR39. Its optical qualities would likely be quite
> a bit better than polycarbonate.
>
> --
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