... HC HMC EMI avaliable Flat Top Bifocal Lens Index: 1.499 1.56 1.60 Diameter: 70/28 75/28 80/28 ... make sure high lens quality and in-time delivery from professional staff, advanced equipment and great material. Having registered with CE, FDA ... lens(uncoated, hard coated, HMC, EMI, Super Hydrophobic) including free form, HI-VEX lenses, with index of 1.499, 1.56, 1.60 ...