Read is a bifocal eye protection available in five diopter strengths: 1.0, 1.5, 2.0, 2.5 and 3.0. A durable polycarbonate frame provides extra side protection and comfort. The clear lenses are ANSI-rated hard-coated polycarbonate with BK-Anti-FOG. BK-Anti-FOG lasts a full two minutes, 15 times longer than European EN 166/168, the only current documented standard in the world. It is permanently bonded to the lens, will not wear off or wash off, and retains its anti-scratch, anti-static and UV protection properties.