reading glasses 1.Material:CR-39 plastic & glass 2.Index:1.499,1.56,1.61,1.67,1.523,1.70 3.CE & FDA certificates reading glassesLocated in Danyang, the ... (index 1.499, 1.56, 1.61, 1.67 uncoated, H/C, H/M/C, size: 65/70/72 mm)3. BIFOCAL LENS (glasses & CR ... curve bifocal lens)4. PROGRESSIVE LENS5. POLYCARBONATE LENS6. PHOTOCHROMIC LENS reading glasses