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A member asked:
Can you tell me how i could tell if my eyeglass lenses are really polycarbinate and not plastic?
A doctor has provided 1 answer
Snap and crack: For the same size lens Plastic is heavier. Polycarbonate will be uv400. For those 2 you probably can't tell. Plastic snaps or shatters went bent past tolerance, polycarbonate just bends and then past tolerance will not resume its original shape. Plastic is typically cheaper but has better optical quality
Answered 4/15/2015
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