Tools & Calculators

You want to deliver the best fit, comfort and visual acuity to all your patients who wear contact lenses. We’re here to help.

The tools and contact lens calculators below* are designed to help you maximise fitting effectiveness, patient care and practice efficiency.

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Spectacle Conversion Calculator

Easily convert a patient’s prescription for glasses to the corresponding contact lens parameters.

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ToriTrack Calculator

Get the calculated theoretical power plus our recommendation for CooperVision toric lenses with specific parameters.

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Efron Grading Scales

A standard clinical reference that helps quantify 16 contact lens wear-related anterior eye conditions.


* The calculators are designed to help eye care practitioners and are not a substitute for a professional contact lens fitting by a qualified eye care practitioner.