... , HC/T, HMC+EMI, SHMC As the largest lens manufacturer in China, Shanghai Conant Optics is the only Chinese ... we are No. 1 in terms of exporting lens quantity in China. We can always make sure high ... ), polarized(Grey, Brown and G-15), polycarbonate, tinted, RX lens(uncoated, hard coated, HMC, EMI, Superhydro) including free form ... , HI-VEX lenses, with index of 1.499(CR39 lens), 1.56, 1.60, 1.67, both in ...