Clinical application of ocular cyclotorsion control in femtosecond laser-assisted in situ keratomileusis(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2026年第4期
- Page:
- 519-524
- Research Field:
- 医学生物物理
- Publishing date:
Info
- Title:
- Clinical application of ocular cyclotorsion control in femtosecond laser-assisted in situ keratomileusis
- Author(s):
- CHEN Bao1; LIU Zhifang2
- 1. Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Hospital of Xiangnan University, Chenzhou 423000, China 2. Department of Ophthalmology, Affiliated Hospital of Xiangnan University, Chenzhou 423000, China
- Keywords:
- Keywords: femtosecond laser laser-assisted in situ keratomileusis ocular cyclotorsion control visual quality higher-order aberration
- PACS:
- R318.51；R779.6
- DOI:
- DOI:10.3969/j.issn.1005-202X.2026.04.015
- Abstract:
- Abstract: Objective To evaluate the clinical value of an ocular cyclotorsion control system in femtosecond-assisted laser in situ keratomileusis (FS-LASIK). Methods A retrospective study was conducted on 120 patients undergoing FS-LASIK between February 2022 and February 2024. These patients were divided into a study group (n=60) and a control group (n=60) based on whether the ocular cyclorotation control was used intraoperatively. All patients received standardized FS-LASIK. Preoperative and 6-month postoperative parameters, including uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), spherical equivalent (SE), visual quality parameters (spherical aberration, coma, trefoil, tetrafoil, Strehl ratio), corneal curvature, cylindrical power, and central corneal thickness, were compared between the two groups. Postoperative complications were also recorded. Results No significant differences were observed in preoperative UCVA, BCVA, and SE between the two groups (P>0.05). At 6 months postoperatively, UCVA, BCVA, and SE were significantly higher than the preoperative values in both groups (P<0.05). In addition, UCVA and SE were higher in the study group than in the control group (P<0.05), whereas no significant difference in BCVA was observed between the two groups (P>0.05). Similarly, there were no significant differences in any parameters of whole-eye visual quality between the two groups preoperatively (P>0.05). At 6 months postoperatively, total higher-order aberrations, spherical aberration, and coma were significantly increased compared with the preoperative values in both groups (P<0.05), but intergroup differences were not statistically significant (P>0.05). In contrast, trefoil, tetrafoil, and Strehl ratio showed no significant differences compared with preoperative values in either group (P>0.05), and no significant differences were found between the two groups (P>0.05). Furthermore, preoperative spherical power, cylindrical power, and corneal thickness were comparable in the two groups (P>0.05). At 6 months postoperatively, the absolute spherical and cylindrical powers were significantly reduced compared with the preoperative values in both groups (P<0.05), and these values were lower in the study group than in the control group (P<0.05). In addition, corneal thickness decreased significantly in both groups compared with the preoperative values (P<0.05), with lower values observed in the study group than in the control group (P<0.05). Regarding postoperative complications, the total complication rates were 20.00% and 13.33% in the control and study groups, respectively, with no statistically significant intergroup differences (P>0.05). Conclusion The application of ocular cyclotorsion control in FS-LASIK may further improve postoperative UCVA and visual quality, contribute to a more stable postoperative refractive status, and demonstrate favorable clinical utility.
Last Update: 2026-04-29