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Contact Lens Vertex Calculator
Convert glasses prescription to contact lens power
Instructions: Enter your glasses prescription (Sphere power in Diopters) and the vertex distance (distance from eye to glasses) below. Note: Vertex adjustment is generally only necessary for powers > ±4.00D.
Prescription Parameters
Calculation Results
⚠️ For educational and estimation purposes only. Do not use this tool to order contact lenses without consulting a licensed eye care professional.