Enter your toric lens prescription details into the calculator to determine the correct lens for your needs.
Toric Lens Calculation Formula
The following formula is used to calculate the toric lens prescription:
Net Prescription = Sphere + Cylinder (at specified Axis) + Add Power
Variables:
- Sphere (D) – The lens power to correct nearsightedness or farsightedness
- Cylinder (D) – The lens power to correct astigmatism
- Axis (°) – The orientation of the astigmatism correction
- Add Power (D) – Additional power for bifocal or multifocal lenses
To calculate the net prescription, add the sphere and cylinder values, specify the axis,