Uvex S0473 FitLogic Reading Magnifier Safety Eyewear, Black/Silver Frame, Clear +2-1/2 Diopter Ultra-Dura Hardcoat Lens Available in +1.5, +2.0 Or +2.5 diopter strength bifocal readers molded directly into a clear lens Floating lens design provides excellent ventilation to minimize fogging Easy and quick lens replacement system Revolutionary browbar self-adjusts for a secure fit Meets ANSI Z87+ and CSA Z94.3 standards