NOV 06, 2017
A Comparison of Toric IOL Calculators and How They Differ
Refractive Subspecialty Day 2016
Refractive Mgmt/Intervention
- The Basic Toric IOL Calculation
- What's needed?
- Verifying regular, symmetric astigmatism
- Correctly identifying the steep meridian
- Determining the power difference between principal meridians
- Including surgically induced astigmatism
- Recent Advances and Additions
- Variable effective lens position
- Adding the posterior cornea as a third vector
- Calculating spherical equivalent
- Reconsidering the concept of surgically induced astigmatism: mean vs. median vs. centroid
- Features of Popular Toric Calculators Currently Used in North America
- Alcon
- AMO
- B+L
- Holladay
- Barrett
- Recommendations