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GCVISION

Prescription Converter

Convert your glasses prescription to contact lens parameters

RRight Eye (OD)

LLeft Eye (OS)

Shop with Your Prescription

Find frames and contact lenses that match your prescription

How to Read Your Prescription

ODOculus Dexter

Right Eye

OSOculus Sinister

Left Eye

SPHSphere

Lens power. Negative = nearsighted, Positive = farsighted

CYLCylinder

Amount of astigmatism

AXISAxis

Direction of astigmatism (0-180°)

ADDAddition

Extra power for reading (progressive lenses)