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Those prices are unbelievable!
Whis is the "index" for lenses mean?
Their standard lens index is 1.57 and for extra cost you can upgrade to either 1.61 or 1.67 index. Is this the thickness of the lens?
I would have coke bottole lens if I don't pay the extra money to get the thinnest material possible. and I don't see anything on this webiste about thickness, etc. options.
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