Use this calculator to determine if patients have enough corneal thickness to safely proceed with laser vision correction. The size of the treatment zone should be as large or larger than the scotopic pupil.

If you do not have pachymetry measurements, the calculations will be based on the average corneal thickness (540 microns). To obtain accurate measurements, you can always send patients to PCLI for a quick pachymetry/topography visit. This 30 minute service is free of charge if patients proceed with surgery.

Click to download a free version of this calculator.

Patient Name: Date:

Roll your cursor over the triangles within the table for further explanations.