Enchroma Ashby - Color Blind Glasses Plastic Acetate frame Proprietary color-enhancing spectral filter. lens non-polarized Lens width: 48 millimeters Lens height: 40 millimeters Bridge: 21 millimeters Arm: 145 millimeters Frame fit: Adult small Multiple colors Sunglass lens Anti-reflection coated for maximum optical clarity. Super hydro-phobic top-coat: easy to clean.