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Glasses to Contacts Prescription Converter
Glasses to Contacts Prescription Converter
Convert any spectacle prescription to a contact lens equivalent — or vice versa — using the standard vertex distance formula. Fully supports astigmatic (toric) prescriptions.
Spectacle Rx (Input)
D
D
°
Settings
mm
Standard clinical default: 12 mm
Converted Contact Lens Rx
Sphere — D
Cylinder — D
Axis — °
Calculation Breakdown
Vertex distance:—
Input sphere:—
Input cylinder:—
Raw converted sphere:—
Raw converted cylinder:—
Axis (unchanged):—
* Sphere & cylinder rounded to selected step. Axis is unchanged by vertex compensation.