our company specializes in producing UV-400 photochromic lens(grey,brown)such as:sphere,cylinder,round-top bifocal,flat-top bifocal,progressive,semi-finished
we also produce 1.499 index CR-39 resin lenses,such as:sphere,cylinder,round-top bifocal,flat-top bifocal,invisible lens,progressive lens,UC,HC,HMC,etc