... 1.61 2. Progressive semi-finished lens 3.Diameter: 70mm/75mm 4.Base:200-800B 5.High Scratch Resistance Finished lenses ... 00 / ADD +1.00 ~ +3.00Semi-finished lenses:1) Diameter: 75mm, 70mm2) Normal corridor (17mm), Short corridor (14mm)3) Base: 200 ... machines(Schneider/Loh),and leybold coating machines.Our prescription lenses:single vision,bifocal lens,progressive lens,polarized lens,photochromic lens,PC ...