角膜屈光手术后角膜地形图不对称指数的变化

IF 0.1 Q4 OPHTHALMOLOGY
Tamer I Abdelhalim, Osama A. Sorour, Mohamed Elkadim, D. Tadros
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引用次数: 0

摘要

目的:我们旨在跟踪低度近视矫正后角膜屈光手术后角膜屈光不对称指数的变化,并确定哪种技术会对指数产生显著影响。患者和方法这项前瞻性研究于2020年10月至2021年12月进行,包括两组患者,屈光性角膜切削术(PRK)组和激光原位角膜磨镶术(LASIK)组。每组患者都必须遵循手术后第二天、1周、1个月和3个月的就诊时间表。未能遵循此时间表的患者被排除在研究之外。结果PRK组42眼,平均裸眼视力显著提高,角膜屈光度(K读数)和瞳孔中心厚度显著降低。表面变异指数、圆锥角膜中心指数和高度偏心指数无明显变化。垂直不对称指数和最小曲率半径(Rmin)显著增加,而高度不对称指数显著降低。我们的LASIK组包括40只眼睛,这些眼睛在裸眼视力、K读数和瞳孔中心厚度方面发生了与PRK组相似的变化。表面变异指数、垂直不对称指数、身高不对称指数、高度偏心指数和Rmin显著增加,而中央圆锥角膜指数显著下降。圆锥角膜指数在两组中均显著降低。结论就角膜不对称性指标的影响而言,PRK技术比LASIK技术更为保守。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Alteration in corneal topography asymmetry indices following corneal refractive surgery
Purpose We aimed to follow up corneal refractive asymmetry index changes following refractive surgery for cornea after correction of low-grade myopia and to determine which technique causes marked affection of the indices. Patients and methods This prospective study conducted from October 2020 to December 2021 included two groups of patients, the photorefractive keratectomy (PRK) group and the laser in-situ keratomileusis (LASIK) group. Every patient in each group had to follow a schedule of visits after surgery for the next day, 1 week, 1 month, and after 3 months. Patients who failed to follow this schedule were excluded from the study. Results The PRK group contained 42 eyes with a mean uncorrected visual acuity that improved significantly, corneal power (K-reading) and pupil center thickness reduced significantly. Surface variance index, central keratoconus index, and height decentration index did not change significantly. Vertical asymmetry index and minimum radius of curvature (Rmin) increased significantly while height asymmetry index decreased significantly. Our LASIK group contained 40 eyes that underwent changes similar to those in the PRK group regarding uncorrected visual acuity, the K-reading, and the pupil center thickness. The surface variance index, vertical asymmetry index, and height asymmetry index, height decentration index and Rmin increased significantly while the central keratoconus index decreased significantly. The keratoconus index reduced significantly in both groups. Conclusion The PRK is a more conservative technique than the LASIK technique regarding the affection of corneal asymmetry indices.
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