... .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 ... & CR-39. round-top bifocal, flat-top bifocal, blended bifocal ... PROGRESSIVE LENS. We are exporting products to many countries of Western Europe, North America, Mid-East Asia and South-East Asia. ...