... 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, ... 28m, 70/30mm).Progressive semi-finished:Diameter 75mm, short corridor 14mm, Regular corridor 17mm.polarized semi-finished:diameter 70mm and 75mm color ... your company to create in wonderful vision. semi-finished lens