Visual quality evaluation of topography-guided FS-LASIK based on phorcides for myopia and astigmatism

OBJECTIVE: To evaluate the clinical outcomes and visual quality after Phorcides planned Contoura topography-guided femtosecond laser-assisted excimer laser in situ keratomileusis (TOPO-G FS-LASIK) for myopia and astigmatism correction. METHODS: Non-randomized retrospective study. 38 eyes in the high ocular residual astigmatism (HORA, >0.75D) group and 44 eyes in the low ocular residual (LORA, 0.05). Objective scatter index, modulation transfer function cut-off, visual acuity (VA) 100%, and all the CS were similar between the two groups preoperatively and postoperatively (P > 0.05). But VA20%/9%, Strehl ratio, the CS of 1.5/3/6/12/18c/d in the HORA group, and 1.5/3/6c/d in the LORA group were significantly elevated 6 m postoperatively. The subjective visual quality questionnaire scores were consistent both within and between groups preoperatively and 6 m postoperatively. CONCLUSIONS: Phorcides planned Contoura TOPO-G FS-LASIK achieved the predicted outcomes, demonstrating objective and universal applicability. Visual quality in the HORA group was significantly improved, especially the night vision and high-frequency spatial CS.