Barrett Toric Calculator

Input Parameters

Axial Length (mm)

Average Keratometry (D)

Corneal Astigmatism (D)

Axis of Astigmatism (degrees)

Anterior Chamber Depth (mm)

Target Refraction (D)

IOL Model

Calculation Results

Recommended IOL Power

--.-- D

Based on Barrett formula

Cylinder Power

--.-- D

At steep axis

Expected Residual Astigmatism

--.-- D

With recommended IOL

Calculation Details

Axis: --°

Target Refraction: --.-- D

ELP: --.-- mm

About Barrett Formula

The Barrett Toric Calculator is based on the work of Dr. Graham Barrett. It uses advanced algorithms to calculate the appropriate toric IOL power and axis, considering posterior corneal astigmatism.

Clinical Tips

Always verify keratometry measurements with multiple devices when possible. Mark the patient's eye at the 0° meridian while in sitting position to account for cyclotorsion.

Important Notes

This calculator provides estimates based on mathematical models. Surgical experience and clinical judgment should always be used in conjunction with these calculations.