Note: This script calculates the amount of magnification lenses create. It was designed with meridional aniseikonia in mind. This script does not take an average of lens magnification automatically. This script also doesn't perform any rounding.
Intructions: Put in as much information as possible. For average lens magnification, take the sperical equivalent of the Rx. When dealing with an Rx that potentially has a significant amount of meridional aniseikonia, put all the information in and select a meridian to calulate the magnification in that meridian for both lenses.

Iseikonic Lens Calculator

Sphere Cylinder Axis

Center Thickness (mm)
Front Surface Power
Index of Material
Vertex Distance (mm)
Meridian (assumed 180 if blank)

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