IOL Formula
IOL Model
📏 Patient Biometry
mm
D
D
D
mm
🎯 Target Refraction
D
years
Recommended IOL Power
0.00 D
Sphere equivalent
Toric Cylinder Power
0.00 D
At IOL plane
Predicted Residual Cylinder
0.00 D
After surgery
Recommended Axis
0°
IOL alignment
Predicted Post-Op SE
0.00 D
Spherical equivalent
IOL Model Recommendation
Envy™ Toric
Based on calculated power
📋 Toric IOL Power Matrix (Available Cylinder Powers)
IOL Cylinder @IOL Plane Corneal Cylinder @Corneal Plane Recommended Toric Model
1.00 D0.75 DEnvy Toric +1.0
1.50 D1.00 DEnvy Toric +1.5
2.25 D1.50 DEnvy Toric +2.25
3.00 D2.00 DEnvy Toric +3.0
3.75 D2.50 DEnvy Toric +3.75
4.50 D3.00 DEnvy Toric +4.5
5.50 D3.75 DEnvy Toric +5.5
6.00 D4.00 DEnvy Toric +6.0
📊 Calculation Parameters
📌 Barrett Toric IOL Calculator Information:
• Formula: Barrett Toric formula accounts for posterior corneal astigmatism
• Axial Length (AL): Normal range 22-25mm (short: <22mm, long: >25mm)
• Corneal Astigmatism: K2 - K1 = total corneal cylinder
• Toric IOL Selection: Toric power should match 80-100% of corneal astigmatism
• Residual Astigmatism: Target typically <0.50D
• ⚠️ Important: This is a demonstration calculator. For clinical use, use the official Barrett Toric calculator online.
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