... 60m5,70mm,75mm 3.Well designed base curve Semi-finished lens(Optical lens)Index: 1.49, 1.56, 1.61Base: 2, ... to 10.00mm relying on different base and power.Coating: Convex side HMCSingle vision: 65mm, 70mm, 75mmBifocal:(Round top 70/ ... coating machines.Our prescription lenses:single vision,bifocal lens,progressive lens,polarized lens,photochromic lens,PC lens,free form…To be ready forTomorrow’s demands ...