Toric IOL Performance During Cataract Surgery With Surgical Guidance System
Purpose
Evaluate the efficacy of the CALLISTO eye surgical guidance system for the reduction of Refractive Cylinder following cataract/Toric IOL surgery.
Methods
Prospective review of 41 eyes, of 35 patients, measured with the IOL Master 500 optical biometer (Carl Zeiss Meditec) and sequential analysis of the Total Corneal Astigmatism with the Galilei G4 (Zeimer, Inc.) during preoperative cataract analysis. Subsequent femtosecond-laser assisted cataract surgical correction was performed with a temporal 2.8 mm near-clear corneal incision and intraoperative alignment of a Toric IOL platform was guided by the CALLISTO eye surgical guidance system (Carl Zeiss Meditec) with biometric information transferred from the IOL Master 500. Images of the surgical eye intraoperatively were then compared to preoperative images to assess accurate axis identification and IOL alignment. Post-operative refractive cylinder was measured at one month.
Results
Preoperative Astigmatism measured 2.02±0.77 Diopter (D), while average axis marking error was 2.50±1.49 degrees and alignment error measured 1.82±0.74 degrees. Mean residual refractive cylinder was 0.37±0.27 D with 100%, 93%, 88%, and 51% of eyes ≤ 1.00 D, 0.75 D, 0.50 D, and 0.25, respectively. The mean absolute error from intended residual astigmatism was 0.26±0.22 D.
Conclusion
The Zeiss Cataract Suite, incorporating the IOL Master 500, OPMI Lumera surgical microscope, and CALLISTO eye guidance system efficiently and effectively reduces astigmatism correction as part of refractive cataract surgery.