Itemssingle vision,bifocal vision,photochromic lens,progressive lens,photochromic progressive lens,semi-finished lens,finished len,RX lens.Index1.499,1.56,1.61,1.67,1.523,1.591,1.71 and so onMaterial1.499-CR-39,1.56-NK-55,1.61-Acrylic,1.67-MR-7,1.523,1.71Mineal,1.59PCColorclear,blue,green,grey,browncoatingUC,HC,HMC,EMI,HMC+EMI,UVHS..