Professional toric IOL power calculation for Johnson & Johnson EYHANCE lenses with advanced visualization tools
ℹ️ IMPORTANT: This calculator is for educational purposes. Always verify calculations with current formulas and consult official EYHANCE resources before clinical use.
Patient Biometry
Axial Length (mm)
Keratometry
Anterior Chamber Depth (mm)
White-to-White (mm)
IOL Selection & Target
EYHANCE Toric Model
Target Refraction
Surgeon Factor (A-Constant)
Calculation Formula
Astigmatism Analysis
Corneal Astigmatism Axis
Astigmatism Diagram
IOL Calculation Results
Recommended IOL
Toric Power: 2.0D
Axis Alignment
Predicted Outcome
Predicted SE: -0.12D
Predicted Cylinder: 0.25D
Predicted UCVA: 20/25
IOL Power Range
Surgical Planning
⚠️ Mark the 0° and 180° meridians preoperatively
📍 Place main incision at 120° to minimize induced astigmatism
✅ Align IOL axis marks with 90° meridian
📏 Consider SIA of 0.3D at incision site
Astigmatism Correction Visualization
How to Use the EYHANCE Toric Calculator
Step 1: Enter Biometry Data
Input accurate axial length, keratometry readings (K1 and K2), anterior chamber depth, and white-to-white measurements from your biometry device.
Step 2: Set Target & Formula
Choose your target refraction (emmetropia, myopia, hyperopia, or custom) and select the calculation formula (SRK/T, Holladay, etc.).
Step 3: Analyze Astigmatism
Enter the corneal astigmatism axis and type (WTR, ATR, or oblique). The calculator will visualize the astigmatism pattern.
Step 4: Calculate & Plan
Review the recommended IOL power, axis alignment, and surgical planning guidance. Use the visualizations to understand the expected outcome.
Frequently Asked Questions
How accurate is the EYHANCE Toric Calculator?
This calculator uses standard IOL calculation formulas and is designed for educational purposes. For clinical use, always verify with official Johnson & Johnson calculators and consider patient-specific factors.
What makes EYHANCE lenses different from standard toric IOLs?
EYHANCE lenses provide an extended range of vision with proprietary surface transition technology, offering better intermediate vision while maintaining good distance vision compared to standard monofocal lenses.
How do I account for surgically induced astigmatism?
The calculator includes options to input your typical SIA based on incision location and size. For precise planning, use your historical data for similar procedures.
What if my patient has irregular astigmatism?
For irregular corneas, consider additional diagnostic tools like corneal topography and consult with a corneal specialist. Toric IOLs may not be appropriate for all cases of irregular astigmatism.