1.56 / 1.61 photo chromic lens Dia : 70 mm Power range : - 8D/-2D Founded in 1990, Wenzhou Brightsun Import & Export Corp., Ltd ... machine: Lens edger, groover, and driller Optical lens:Optical lens: 1.499 Cr39 lens, 1.56, 1.60,1.67 optical lens, Polycarbonate lens, photochromic lens, Mineral lens, sunglasses lens, Cr39 Polarized lens. Glass ...