Pattern of increase in Spherical Aberration and Coma After Femtosecond Laser Assisted In-Situ Keratomileusis Using an Aspheric Ablation Profile

Journal of Ophthalmology and Advance Research Pub Date : 2023-04-05 DOI:10.46889/joar.2023.4105

M. Hosny

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Abstract

Purpose: To determine the contribution of spherical aberration and coma to the total ocular high order aberration before and after femto laser-assisted in-situ keratomileusis using an aspheric ablation profile. Methods: This is a prospective interventional study that was conducted on 34 eyes of 17 patients in the interval between January 2021 and June 2021. Patients did a preoperative aberrometry and corneal tomography. They underwent FS-LASIK surgery using an aspheric ablation profile. The total ocular aberrometry and corneal tomography were repeated one month postoperatively. Results: The mean preoperative contribution of coma to total ocular HOA was 52.16 % with SD of ± 25.59% which declined to 49.48 % with SD of ± 22.53 % postoperatively. The mean preoperative contribution of SA to total ocular HOA was 38.91 % with SD of ± 15.35 % which increased significantly to 51.25 % with SD of ± 16.55 % postoperatively. Conclusion: Post-operative contribution of corneal spherical aberrations to total ocular HOA showed a statistically significant increase compared to pre-operative. However, there was no significant change in coma contribution.

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使用非球面烧蚀轮廓的飞秒激光辅助原位角膜磨砂术后球差和彗差的增加模式

目的:探讨非球面消融激光原位角膜磨除术前后球差和彗差对总高阶像差的影响。方法:这是一项前瞻性介入研究，在2021年1月至2021年6月期间对17名患者的34只眼睛进行了研究。患者术前做了像差测量和角膜断层扫描。他们接受了使用非球面消融轮廓的FS-LASIK手术。术后1个月复查全眼像差和角膜断层扫描。结果:术前昏迷对眼总HOA的平均贡献为52.16%，SD为±25.59%;术后昏迷对眼总HOA的平均贡献为49.48%，SD为±22.53%。术前SA对眼总HOA的平均贡献为38.91%，SD为±15.35%;术后SA对眼总HOA的平均贡献为51.25%，SD为±16.55%。结论:与术前相比，术后角膜球差对总HOA的贡献有统计学意义的增加。然而，昏迷的贡献没有显著变化。

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Journal of Ophthalmology and Advance Research

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