Barrett Toric Calculator - Professional Toric IOL Analysis | Webtoolx.xyz

Barrett Toric Calculator

Professional Toric IOL Analysis for Astigmatism Correction

Patient & Ocular Details

Doctor Name:

Patient Name:

Patient ID:

Eye:

Birth Date:

Ocular Measurements

Keratometry Reading K1 (D):

Keratometry Reading K2 (D):

Flat K (D):

Flat Axis (°):

Steep K (D):

Steep Axis (°):

Axial Length (mm):

Optical ACD (mm):

Target Refraction (D):

Incision SIA (D):

Incision Location (°):

Lens Thickness (mm):

White-to-White (WTW in mm):

Calculation Parameters

Parameter Type:

Parameter Value:

For Lens Factor, enter a value between -2.0 and 5.0. For A Constant, enter a value between 112 and 125.

Calculate Barrett Toric IOL Power

About the Barrett Toric Calculator

The Barrett Toric Calculator is a cutting-edge tool used in cataract surgery to determine the ideal toric intraocular lens (IOL) power for astigmatism correction. It integrates various ocular measurements—such as keratometry readings, axial length, and optical ACD—with surgical parameters like SIA and incision details to provide an accurate estimation.

Required Measurements:

Keratometry Readings (K1 & K2)
Flat K and Flat Axis
Steep K and Steep Axis
Axial Length
Optical ACD
Target Refraction
Incision SIA and Incision Location
Lens Thickness and WTW

Calculation Method:
Our simplified Barrett Toric formula for demonstration purposes is:

Estimated Toric IOL Power = [ (Steep K - Flat K) × 0.5 + (Axial Length / Optical ACD) × 0.2 + (Lens Thickness / WTW) × 0.1 + Incision SIA ] - (Target Refraction / 10) + Adjustment

Adjustment: Based on the selected parameter:

If Lens Factor is chosen, the adjustment equals the entered value.
If A Constant is chosen, the adjustment equals ((A Constant - 112) / 10).

This calculator provides an educational estimation of the toric IOL power required. For clinical decisions, please consult with a professional ophthalmologist.