Base Curve Calculator


The Base Curve Calculator is to be used with the Tangential Curvature topography map with Sim Ks and 5mm zone included and numerical values displayed.
Insert Sim Ks and flattest & steepest values from the 5mm ring and click Calculate
Please choose diopter or mm from drop down box

Measurement in: Enter values in mm              * To be used with Tangential curvature map
Steep (Sim K)
Flat (Sim K)
Steep (5mm ring)
Flat (5mm ring)

Use correction factor 1.30 if K Reading is under 7mm and over 48.21D.
Use correction factor 0.8 if K reading is over 7mm and under 48.21D.