Catseye Safety Mags keep your eyes safe while working and still give you the ability to see close up with built-in bifocal type magnifier lenses. Tough, impact resistant poly-carbonate lenses have an anti-fog coating, resist scratches, and also offer UV protection. Ultra-comfortable wrap-around style with rubberized grip temples. Glasses listed by diopter (magnification strength) of the magnifier lens. Higher diopter number glasses have greater magnification. ANSI rated Z87.1 . Imported