Detailed Product Description 1.56 optical lens : (1)n=1.56 single vision white finished and semi-finished optical lens (UC , HMC) dia:65mm ... .00(2)n=1.56 single vision ASPHERIC white finished and semi-finished optical lens (UC, HMC) dia:65mm /70mm power range ... ) n=1.56 single vision photochromic Grey/Brown finished optical lens (UC ,HMC ) dia: 65mm/ 70mm power range: sphere: 0.00 ...