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Here's a handy tool for eye care practitioners! Use our Sphere Spectacle Conversion Calculator* to easily convert a patient's eyeglasses prescription to the corresponding contact lens parameters and use your expertise to make further refinements. Refer to our Toric or Multifocal calculators for other prescriptions.

Spectacle values

Eye
Sphere*
Cylinder
Axis
Vertex
R
-
L
-

Contact lens results

Eye Sphere Cylinder Axis
R
1.01
L
1.01
Based on nominal 12mm vertex distance

Recommended results

Eye Sphere Cylinder Axis
R
+1.00
L
+1.00
Based on nominal 12mm vertex distance

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