... HMC EMI avaliable Flat Top Bifocal Lens Index: 1.499 1.56 1.60 Diameter: 70/28 75/28 80/ ... finished & semi finishedAs the largest lens manufacturer in China, Wan Xin Optical is the only Chinese listed company ... statistics, we are No. 1 in terms of exporting lens quantity in China. We can always make sure ... form, HI-VEX lenses, with index of 1.499, 1.56, 1.60, 1.67, both in finished and semi-finished. At ...