SSP Eyewear Top Focal Tactical Safety Glasses Kit with Assorted Interchangeable 1.50 Bifocal Lenses,TF 1.50 AST KIT Bifocal is at TOP of lens NOT at the bottom - Magnifier at the top of the lens is 3/8 inch from the top of the frame down by 1-1/4 inch wide Designed for pistol shooters and instructors allowing for in-focus view of front site Other users include mechanics, electricians and anyone doing overhead work Anti-fog coating, is double sided & permanently bonded to the lens, lasting 65% longer Provide 100% protection from harmful UVA/UVB rays Feature optically correct, decentered, shatterproof, polycarbonate lenses to virtually eliminate distortion Offer sharp peripheral vision, without any blind spots Permanent durable anti-scratch hard coating Exceeds ANSI Z87.1+2015 specifications for high impact protection