1.499 polarized lens blank G-15, G16, Brown Shanghai Conant Optics is the only Chinese listed manufacturer in the optical industry. In 2009, ... according to Chinese customs statistics, we are No. 1 in terms of exporting lens quantity in ... tinted, RX lens(uncoated, hard coated, HMC, EMI) including free form, HI-VEX lenses, with index of 1.499, 1.56, 1.60, 1.67, both ...