optical lens 1.CE & FDA, Drop-ball Test 2.CR 1.49, 1.56, 1.60, 1.67, ... 3.Mineral 1.523, 1.70 4.Finished & Semi-finished optical lens1. CR 1.499, 1.56, 1.60, 1.67 ... +EMI6. Lens Easy Tint any colors Registered FDA, Drop-ball Test & CE Certificate Good quality with competitive price ! Very light and ...