1.499 bifocal lens 1.Round top/flat top 2.Finished and semi-finsihed 3.65/28mm, 70/ ... , China Main features1.499 Bifocal Lens Refraction Index: Nd=1.5 Abbe value: 591)Diamter: 65mm/28mm 70mm/28mm2)Uncoated, Hard ... Coated, Multi-Coated3) Round top and flat top4) Finished and semi-finished 5)Imported PPG monomer High scratch resistance Super-hard ...