I found in my basement some nice 75mm -7.25sph and -8.25sph plastic lenses. They seem to be quite yellow.
Can I sell them as blue light blocking lenses?
I found in my basement some nice 75mm -7.25sph and -8.25sph plastic lenses. They seem to be quite yellow.
Can I sell them as blue light blocking lenses?
.................could also be just old CR39 lenses made in the old days.
Have some of them too.
Think that's what he meant Chris
Sure. No one can agree on research findings or where or not it is hogwash, so why not?
Have I told you today how much I hate poly?
The first CR-39 ophthalmic lenses were produced and marketed by Armorlite in 1947:
http://www.opticalheritagemuseum.org...rliteStory.pdf
More good historical info here:
http://www.opticalheritagemuseum.org...erialsCR39.htm
I'm Andrew Hamm and I approve this message.
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