Abstract

Design:- A retrospective comparative study.
Purpose: To compare the safety, efficacy, and visual outcomes of topography-guided (TG) LASIK ablation versus Advanced Ablation Algorithm (AAA) on Zeiss Mel 90 on virgin eyes.
Methods: Case sheets of 30 patients who underwent TG LASIK and 45 patients who underwent AAA LASIK between January 2021 and September 2022 were reviewed. Both groups were compared for visual outcomes, residual refraction, and root mean square higher order aberrations (rms HOA) at 1 week, 1 month, 3 months and 6 months postoperatively.
Results: The mean 6 months decimal postoperative UCVA was 0.98 (0.13) and 1.0 in the TG group and 0.97 (0.14) in the AAA group respectively (p=0.99). The postoperative increase in rms HOA was comparable in both groups (p=0.55). The ablation duration was significantly longer in topo-guided LASIK (p=0.001).
Conclusion: AAA LASIK on MEL 90 is comparable to topography-guided LASIK for the management of low myopia and myopic astigmatism.