... 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/C, H/M/C, size: 65/70/72 mm)3. BIFOCAL LENS (glasses ... -top bifocal, flat-top bifocal, blended bifocal and curve bifocal lens)4. PROGRESSIVE LENS. 1.70 asp white hi-index glass ...