... UC HC HMC EMI avaliable Flat Top Bifocal Lens Index: 1.499 1.56 1.60 Diameter: 70/28 75/28 80/28 70 ... -known optical companies.We produce single vision, bifocal, progressive, photochromic(Grey, Brown), polarized(Grey, Brown and G-15), polycarbonate, tinted, RX lens(uncoated ... ) including free form, HI-VEX lenses, with index of 1.499, 1.56, 1.60, 1.67, both in finished and semi-finished. At the ...