Hyper‑Premium Toric Calculator
A clean, surgeon-friendly interface with vector-based astigmatism math. Enter keratometry, axis, SIA, and incision axis to estimate net corneal cylinder, recommended toric cylinder and axis, and predicted residual.
Results
Enter values and hit Calculate. You’ll see net corneal cylinder, recommended toric cylinder and axis, and predicted residual.
Net Corneal Cylinder
Recommended Toric
Predicted Residual
Toric Steps
| Component | Magnitude (D) | Axis (°) |
|---|---|---|
| Corneal Astig (K2 − K1) | — | — |
| SIA Vector (assumed flattening at incision axis) | — | — |
| Net Corneal Astig | — | — |
| Recommended Toric @ cornea | — | — |
| Predicted Residual @ cornea | — | — |
J0, J45 with the double‑angle transform.
Net corneal cylinder is computed by subtracting the SIA vector from measured corneal astigmatism.
Toric recommendation chooses the closest available step after applying an IOL-to-cornea conversion ratio.
Hyper‑Premium Toric Calculator
A clean, surgeon-friendly interface with vector-based astigmatism math. Enter keratometry, axis, SIA, and incision axis to estimate net corneal cylinder, recommended toric cylinder and axis, and predicted residual.
Results
Enter values and hit Calculate. You’ll see net corneal cylinder, recommended toric cylinder and axis, and predicted residual.
Net Corneal Cylinder
Recommended Toric
Predicted Residual
Toric Steps
| Component | Magnitude (D) | Axis (°) |
|---|---|---|
| Corneal Astig (K2 − K1) | — | — |
| SIA Vector (assumed flattening at incision axis) | — | — |
| Net Corneal Astig | — | — |
| Recommended Toric @ cornea | — | — |
| Predicted Residual @ cornea | — | — |
J0, J45 with the double‑angle transform.
Net corneal cylinder is computed by subtracting the SIA vector from measured corneal astigmatism.
Toric recommendation chooses the closest available step after applying an IOL-to-cornea conversion ratio.