Clinical Outcomes Of Ray Tracing-Guided Lasik For Myopic Astigmatism Correction
Published 2026 - 44th Congress of the ESCRS
Reference: FP31.02 | Type: Free paper | DOI: 10.82333/fcqt-4t32
Authors: Ms Yue Wang* 1 , Ms Jiayu Pan 1 , Ms Zhaojin Li 1 , Mr Jifan Wang 1 , Mr Guosheng Cheng 1 , Mr Xianhao Zhao 1 , A/Prof. Xuejun Fang 1
1Liaoning Aier Eye Hospital,shenyang,China
Purpose
To evaluate real world clinical outcomes of Ray Tracing-Guided LASIK for the correction of various degrees of myopic astigmatism.
Setting
A retrospective analysis
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
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 2 or more lines of UDVA compared to preoperatively. Refractive outcomes showed manifest refraction spherical equivalent within ±0.5D in 466 eyes (79.52%) and within ±1.0D in 578 eyes (98.63%). For eyes with astigmatism <1.0D, the correction index was 1.33±0.61 and index of success was 0.85±0.75, indicating overcorrection. The Angle of Error was within ±15° in 74.89% of eyes with <1.0D cylinder, 99.23% with 1.0–2.0D, and 100% with ≥2.0D. As the astigmatism cylinder increased, CI and IOS values decreased
Conclusions
Ray Tracing-Guided LASIK demonstrated safety, efficacy, predictability and stability for correcting myopic astigmatism. Ablation profile and treatment should be adjusted for patients with low and high astigmatism.