1.56 photochromic optical lens 1.Fast color change,UV400 ,HMC+EMI 2.Clear vision ,comfortable for eyes 3.Small orders accept CR39 1.56 Photochromic Grey or Brown optical Lens /Medical lens Description:1. Material:Cr39 Abbe38Gravity1.28Abrasion6-8HFunctionUV400 ,Radiation protectiveCoatingHC,HMC, Hydrophobic availableAR colorGreen,Blue,Pink,GoldLens colorphoto grey or brown2, Safety: The lens ...