... (optional).Main Specifications: Measurement RangeMinimumSph. Lenses0~±25D0.01D,0.12D,0.25DCyl. Lenses0±10D0.01D,0.12D,0.25DCyl. Axial Angle0~180 ... °Prism0~10Δ0.01Δ,0.12Δ,0.25ΔADD0.10D0.01D,0.12D,0.25DAbbe Compensation numbers20,30,40,50,60Lens ...