Transposition & Spherical Equivalent
Convert cylinder signs and find the spherical equivalent instantly.
SPH
CYL
AXIS
Transposed Rx
SPH--
CYL--
AXIS--
Spherical Equivalent
SPH + (CYL / 2)
Near & Intermediate Vision Calculator
Enter Distance Rx and Reading ADD to automatically generate Near and Intermediate (Computer) prescriptions.
Near Vision (Reading)
SPH--
CYL--
AXIS--
Intermediate (Computer)
SPH--
CYL--
AXIS--
*Inter ADD is calculated as 50% of Total Near ADD.
Spectacle to Contact Lens Converter
Adjust high powers (over +/- 4.00D) for Contact Lenses based on Vertex Distance.
Required Contact Lens Power
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*Rounded to nearest available 0.25 Diopter step.
Reading ADD Estimator
Estimate Presbyopic Addition based on patient age.
Disclaimer: This is a standard clinical guideline.
Always perform subjective refraction to confirm patient comfort.
Estimated Reading Addition
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