High Index optical lens first-class imported material complete quality control single vision, ... Conant Optics is the only Chinese listed manufacturer in the optical lens industry. In 2009, according to Chinese customs statistics, we ... polycarbonate, tinted, RX lens(uncoated, hard coated, HMC, EMI, Superhydro) including free form, HI-VEX lenses, with index of 1.499, 1.56, 1.60, 1.67, both in finished ...