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Surface Curve Conversion

Fill in the input fields and then press the Calculate button in order to compute the radius of curvature, 1.530 tool-based surface power, actual material-based surface power, and sagitta (at the specified diameter) of a lens surface, given any one of these values.

Surface Curve Conversion Form

Convert From?
Radius of Curvature
1.530 Surface Power
Actual Surface Power
Measurement or Reading? (mm)
Lens Material Type?
Radius of Curvature (mm):
Sagitta at 50.0 (mm):
Actual Surface Power (D):
1.530 Surface Power (D):