Polarized lens Material : CR39 from PPG Finished: Plano, Decentered Plano Semi finished: single vision, bifocal, progressive Shanghai Conant Optics ... with most global quality standards. We have been suppling lens to many world-known optical companies.We produce single vision ... ), polarized(Grey, Brown and G-15), polycarbonate, tinted, RX lens(uncoated, hard coated, HMC, EMI) including free form, HI-VEX ...