Polarized lens Material : CR39 from PPG Finished: Plano, Decentered Plano Semi finished: single vision, bifocal, progressive Shanghai Conant Optics is ... (uncoated, hard coated, HMC, EMI) including free form, HI-VEX lenses, with index of 1.499, 1.56, 1.60, 1 ... a leading lab with advanced equipments for the above RX lenses. We believe that we will easily earn your trust with ...