PTA Calculator

OD — Right Eye

Sphere
Cylinder
Scaling
Flap / PRK
Ablation Depth0
Tissue Altered0
Residual Bed: —
Residual Bed minimum recommended: 300 µm
PTA: —
PTA upper limit: 40%

OS — Left Eye

Sphere
Cylinder
Scaling
Flap / PRK
Ablation Depth0
Tissue Altered0
Residual Bed: —
Residual Bed minimum recommended: 300 µm
PTA: —
PTA upper limit: 40%
This calculator is provided for informational and educational purposes only and is not a substitute for professional medical judgment. This site makes no representations or warranties, express or implied, as to the accuracy, completeness, or reliability of any calculation or result produced. Use of this tool does not create a physician-patient relationship. All clinical decisions must be made by a qualified ophthalmologist based on direct patient evaluation. To the fullest extent permitted by law, the developer(s) of this site assume no liability or responsibility for any damages, injury, or loss arising from the use of, or reliance on, this tool. Use is entirely at your own risk.