... .Diameter: 60m5,70mm,75mm 3.Well designed base curve Semi-finished lens(Optical lens)Index: 1.49, 1.56, 1.61Base: 2,4 ... prescription lenses:single vision,bifocal lens,progressive lens,polarized lens,photochromic lens,PC lens,free form…To be ready forTomorrow’s demands,Rissee Rx lab has ...