1.1.50 1.56 1.60 and 1.67 Semi-finished lens 2.Diameter: 60m5,70mm,75mm 3.Well designed base curve Semi-finished lens(Optical lens)Index: 1.49, 1.56, 1.61Base: 2,4,6,8,10,12,14Center thickness; 3.00 to 10.00mm relying on different base and power.Coating: Convex side HMCSingle vision: 65mm, 70mm, 75mmBifocal:(Round top 70/28mm, 70/24mm). Blend top(70/28mm, 70/24mm)Flat top: (70/28m, 70/30mm). ...