Liu Shengtao, Yu Lanhui, Lu Zhiyuan, Cheng Chiwen, Gu Xuejun, Liu Jingying, Zhou Xingtao
Department of Ophthalmology and Optometry, Eye and ENT Hospital, Fudan University, Shanghai, China.
NHC Key Laboratory of Myopia, Fudan University, Shanghai, China.
Front Med (Lausanne). 2022 Oct 18;9:982892. doi: 10.3389/fmed.2022.982892. eCollection 2022.
To investigate the influence of keratometric astigmatism on visual outcomes following small incision lenticule extraction (SMILE).
Eighty eyes undergoing SMILE for myopia correction were classified into two groups based on preoperative keratometric astigmatism: low keratometric astigmatism (LA) and high keratometric astigmatism (HA) groups. Refractive outcomes, vector components, and changes in higher order aberrations (HOAs) were evaluated preoperatively and 6 months postoperatively.
At the postoperative 6-month visit, no significant difference was observed in the decentered distance between the HA and LA groups (HA: 0.17 ± 0.08 mm, LA: 0.16 ± 0.08 mm, = 0.189). No significant differences in the correction index ( = 0.481), absolute angle of error ( = 0.104), or index of success ( = 0.147) were observed between the two groups. There was no significant difference in the induction of corneal aberrations between the two groups. Furthermore, there were no significant associations between the decentered distance and the vector components of astigmatic correction or induction of higher-order aberration in the HA group ( ≥ 0.294, ≥ 0.112) or the LA group ( ≥ 0.323, ≥ 0.080).
SMILE for high keratometric astigmatism could achieve comparable treatment centration and visual quality to that of low keratometric astigmatism.
探讨角膜散光对小切口透镜切除术（SMILE）术后视觉效果的影响。
将80例行SMILE矫正近视的眼睛根据术前角膜散光分为两组：低角膜散光（LA）组和高角膜散光（HA）组。术前及术后6个月评估屈光结果、矢量分量和高阶像差（HOAs）的变化。
术后6个月随访时，HA组和LA组的偏心距离无显著差异（HA：0.17±0.08mm，LA：0.16±0.08mm，P = 0.189）。两组在矫正指数（P = 0.481）、绝对误差角（P = 0.104）或成功指数（P = 0.147）方面均无显著差异。两组之间角膜像差的诱导无显著差异。此外，HA组（P≥0.294，P≥0.112）或LA组（P≥0.323，P≥0.080）的偏心距离与散光矫正的矢量分量或高阶像差的诱导之间均无显著相关性。
高角膜散光的SMILE手术在治疗中心定位和视觉质量方面可达到与低角膜散光相当的效果。
