... mineral lenses, photochromic lenses, We provide these optical lens as following:Optical Lens, CR39 1.56 Photochromic Gray/brown, CR39 1 ... 499 Single Vision,1.70 aspheric lens, 1.70 Titan lens, CR39 Lenticular lens, 1.61 High-index lens, 1.61 Hicyl lensSemi-finished ... bifocal/flat top bifocalMineral 1.523 Lens, CR39 sun lens, PC Polarized lens, 2, Safety: The lens adopt latest new material, high anti ...