Comparative study of objective visual quality between FS-LASIK and SMART in myopia

• Published in: International journal of ophthalmology 2022-03, Vol.15 (3), p.502-509
• Main Authors: Wu, Yuan, Huang, Yue, Wang, Shu-Han, Wang, Gui-Qin, Yu, Ao-Miao, Zhao, Shao-Zhen, Wei, Rui-Hua, Yang, Rui-Bo, Zhang, Chen
• Format: Article
• Language: English
• Subjects: Clinical Research; fs-lasik; higher-order aberrations; myopia; smart pulse technology; visual quality
• ISSN: 2222-3959; 2227-4898
• DOI: 10.18240/ijo.2022.03.20

To compare the changes in the objective visual quality of patients with low and moderate myopia postoperatively after transepithelial photorefractive keratectomy using the smart pulse technology (SMART) and femtosecond laser keratomileusis (FS-LASIK). Corneal higher-order aberrations (HOAs), horizontal coma, vertical coma and spherical aberration were measured using Pentacam, and cutoff for modulation transfer function (MTF cutoff), objective scatter index (OSI) and Strehl ratio (SR) was measured using an optical quality analysis system (OQAS-II), before and after operation at 1, 3, and 6mo, and data were analyzed by repeated measurement two-way analysis of variance. The difference in uncorrected distance visual acuity between SMART and FS-LASIK was statistically significant only 1wk postoperatively. Approximately 86.36% and 80.69% of patients with spherical equivalent (SE) in ±0.50 D were observed in the SMART and FS-LASIK groups, respectively. No significant difference was observed in SE between the two groups ( =0.509). The HOAs increased postoperatively compared with those before surgery in both groups ( 0.05). Corneal vertical coma and Δcorneal vertical coma in the FS-LASIK group were higher than those in the SMART group (