ANSI Z80.31-2017 specifies the minimum requirements for complete ready-to-wear near-vision spectacles with positive power available directly to the public without the prescription of a licensed professional.
ANSI Z80.31-2017
Original price was: $50.00.$25.00Current price is: $25.00.
Ophthalmic Optics – Specifications for Ready-to-Wear Near-Vision Spectacles
American National Standards Institute , 02/06/2018
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