AUTO REF/KERATOMETER 1. Refractometer Vetex Distance(vd): 0.0,12.0,13.75mm Sphere Power (SPH): -20.00+20.00D(In case of VD=12mm) Cylinder Power(CYL): 0.00±10.00D(0.12/0.25DUnit) 2. Keratometry Radius of Curvature: 5.010.2mm(Increments:0.01mm) Corneal Power: 33.0067.50D(when corner equivalent Refractive index is 1.337;0.05/0.12/0.25Dunit)