The Brass Knuckle Read Safety Glasses, No. BKREAD-6010, provide bifocal eye protection and are designed to help prevent the hazardous practice of switching back and forth between regular safety glasses and reading glasses on the job. The protective readers are 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 all-day comfort. The clear lenses are ANSI-rated hard-coated polycarbonate with BK-Anti-FOG which is permanently bonded to the lens, ensuring it will not wear off and will retain its anti-scratch, anti-static, and UV protection properties.