"BX READER" SAFETY EYEWEAR Frame Color: Silver/Black . Lens Tint: Clear. Diopter strength: 2.0 Designed to adjust to workers. Adjustable temple lengths. Universal fit nose bridge. Three lens angles for custom fit. Reader lenses available for up close work. High impact polycarbonate lens blocks 99.9% uv rays. Meets ansi Z87.1 2003 & Csa Z94.3 standards.