Optic lens manufacturer based in China Mainland. We have:*Glass Bifocal - Photo-chromic (n=1.523) flat-top - UV white flat-top- Photo-chromic (n=1.523) round-shape- UV white round-shape(All above have semi-finished, finished, and Multi-coated)*Glass Single Vision - White single vision - Photo-gray (n=1.523) Single Vision- Photo-brown (n=1.523) Single Vision- UV white Hi-index (n = 1.70)- Brown Hi-index- UV white Hi-cylinder (up to 4D)- Photo-gray (n=1.523) Hi-cylinder (up to 4D)(All above have semi-finished, finished, and Multi-coated)*CR39 Lenses - 1.499 single vision, UC, HC, HMC+EMI- 1.56 single vision, HMC - 1.49/1.56 sv Hi-cylinder, UC, HC, HMC- 1.499 bifocal, normal white, HMC, round-shape and flat-top- Photo-chromic single vision, 1.56, HC & HMC