... 523 2.uncoated, HC, HMC 3.Diameter: 70, 65,60, 55 cr-39 optical lens1. various types: cr 39 ... me for detailsBesides, we can supply you the lens as following: 1. GLASS LENS (index 1.523, 1.70, uncoated & ... A/R, size 65/70 mm)2. CR-39 LENS (index 1.499, 1.56, 1.61, uncoated, H ... size: 65/70/72 mm)3. BIFOCAL LENS (glasses & CR-39. round-top bifocal, flat-top bifocal, blended bifocal and curve bifocal ...