Visual outcomes after wavefront-guided photorefractive keratectomy and wavefront-guided laser in situ keratomileusis: Prospective comparison

RESULTS: The PRK group comprised 101 eyes and the LASIK group, 102 eyes. At 6 months, the mean UDVA was y0.03 logMAR G 0.10 [SD] (20/19) and 0.07 G 0.09 logMAR (20/24), respectively (P Z .544). In both groups, 75% eyes achieved a UDVA of 20/20 or better (PZ .923); 77% of eyes in the PRK group and 88% in the LASIK group were within G0.50 diopter of emmetropia ( PZ .760). There was no statistically significant difference between groups in contrast sensitivity at 3, 6, 12, or 18 cycles per degree. The mean postoperative HOA root mean square was 0.45 G 0.13 mm in the PRK group and 0.59 G 0.22 mm in the LASIK group (PZ .012), representing an increase factor of 1.22 and 1.74, respectively. CONCLUSIONS: Wavefront-guided PRK and wavefront-guided LASIK had similar efficacy, predictability, safety, and contrast sensitivity; however, wavefront-guided PRK induced statistically fewer HOAs than wavefront-guided LASIK at 6 months.