For users who wear prescription glasses, Rx Overglasses offer high protection while still providing excellent vision. The glasses fit over most prescription eyewear and feature horizontal and vertical adjustable temples, anti-fog lens and Tuff-Stuffв„ў anti-scratch lens coating. The limited lens curvature offers the best optics and distortion-free wide-angle viewing. Meets general protector and impact requirements for ANSI/ISEA Z87.1-2010