3M Lexa Readers 1.5 Diopter Medium Safety Glasses With Clear Polycarbonate DX Anti-Fog Anti-Scratch Hard Coat Lens 3M Lexa Readers 1.5 Diopter Medium Safety Glasses With Clear Polycarbonate DX Anti-Fog Anti-Scratch Hard Coat Lens Meets ANSI Z87.1-2003 and CSA Z94.3-2002 Standards