摘要： Aim. To compare the postoperative one-year outcomes of asphericity (Q) and high order aberration (HOA) values of 9.0 and 9.2 mm diameter ?ap groups in hypermetropia and hypermetropic astigmatism subjects who underwent femtosecond laser in-situ keratomileusis (LASIK). Materials and Methods. The study included 68 eyes of 34 patients. A femtosecond laser platform (Allegrato Wave, Wavelight AG, Erlangen, Germany) was used for ?ap cutting. Corneal stroma was ablated using Wavelight EX500 with wavefront-optimized pro?le (WaveLight GmbH, Erlangen, Germany). 9.0 mm ?ap diameter was randomly chosen for one eye, and 9.2 mm ?ap diameter was chosen for the fellow eye. Two eyes of the patients who used two di?erent ?ap diameters were enrolled into two di?erent groups. Corneal stroma was ablated using Wavelight EX500 with wavefront-optimized pro?le (WaveLight GmbH, Erlangen, Germany). Postoperative one-year outcomes of Q and HOA values of 9.0 and 9.2 mm diameter ?ap groups were compared statistically. Results. The preoperative manifest refraction spherical equivalents of the 9.0 and 9.2 mm diameter ?ap groups were 1.86 ± 1.81 D and 1.69 ± 1.99 D (p ? 0.754). No intraoperative or postoperative complications were observed. At postoperative one-year, Q values were 0.98 ± 0.13 D and 0.91 ± 0.15 D (p ? 0.029). HOAs including horizontal and vertical coma, horizontal and vertical trefoil, spherical aberration, and second order vertical coma were not signi?cantly di?erent (p > 0.05 for all). Total HOA values were 1.62 ± 0.14 and 1.40 ± 0.16, in the 9.0 and 9.2 mm diameter ?ap groups, respectively (p < 0.001). Conclusion. Both the 9.0 and 9.2 mm diameter ?ap options in femtosecond LASIK are equally safe and e?ective. Many of the HOA values are similar in both options, and better results were provided in terms of total HOA and Q values with the 9.2 mm diameter ?ap option. This study was registered with trial registration number 118-011.