Vertex Distance (VD)0mm, 12mm,13.5mm,15mm Sphere Sphere:-20.00m-1~ +20.00m-1 (Step: 0.01m-1/0.06 m-1/0.12 m-1/0.25 m-1) Diopter Axis 0°~180° (Step: 1°) Measurement Pupillary distance range 55mm~75mm (Step: 0.1mm) Min PD φ2.0mm Optotype Fogging chart Radius of curvature 6.5mm~9.1mm (0.01 mm Step) |