posEYEdon Diagnostic Lens Calculator

Instructions

Select the flat and steep radius and eccentricities for each eye.

When a value is selected, the border will turn gray.

When all 4 boxes are populated, the suggested color coded Diagnostic Lens number and corresponding parameters will be displayed at the bottom.

If the Estimated Initial Center Clearance is a negative number, bearing is expected on the steepest lens and you may want to consider a Custom Stable lens.