... curvature of contact lensRefractometryVertex Distanceprinter Thermal printerSaving Settings 3 , 5 , 10 MinutesMonitors 5.6 ?inch of TFT monitorsPower AC 100 ~ 240V,50 ... .00D(VD=12 ,0.12or0.25D )Cylinder degree0.00~+/-10.00D(0.12 or 0.25D)Axial1~180 °(step ... .00 ~ 67.50DCorneal astigmatism0.00 ~ -15.00D ( 0.05/0.12/0.25D )Corneal diameter2.0 ~ 12.0OthersprinterThermal printerSaving Settings3 , 5 , 10 ...