Clinical outcomes of ray tracing-guided LASIK for myopic astigmatism correction

PURPOSE: To evaluate real world clinical outcomes of Ray Tracing-Guided LASIK for the correction of various degrees of myopic astigmatism. METHODS: A retrospective analysis of patients who underwent Ray Tracing-Guided LASIK. The safety, efficacy, stability, and predictability of the surgery were also analyzed. Vector analysis was used to assess astigmatism outcomes at 3 months postoperatively. Subgroup analysis was performed for different degrees of astigmatism to explore the ablation designs for each group. RESULTS: A total of 309 patients (586 eyes) were included in this study. At 3 months postoperatively, 586 eyes (100.0%) achieved uncorrected distance visual acuity (UDVA) of 20/25 or better, and 579 eyes (98.81%) achieved a UDVA of 20/20 or better. No eye lost two or more lines of UDVA compared to preoperatively. Refractive outcomes showed manifest refraction spherical equivalent (MRSE) within ±0.5D in 466 eyes (79.52%) and within ±1.0D in 578 eyes (98.63%). For eyes with astigmatism