Toric calculator

Fitting astigmatic patients with lenses can present unique challenges. Our Toric Calculator* can help.

One eye at a time, simply enter the patient’s spectacle prescription and vertex to begin. Click the “Calculate” button. Then select the patient’s lens modality. The results will include:

  • The calculated theoretical power. Use it as a starting point for any manufacturer’s toric lenses.
  • The specific parameters for one or more CooperVision toric lens brands that we recommend.

You’ll also be able to refine the axis and sphere power. Use these results together with your toric lens fitting process to select the right contact lenses for your patients.


* The calculator is designed to help eye care practitioners. It is not a substitute for a professional contact lens fitting by a qualified eye care practitioner.