Posterior corneal elevation after small incision lenticule extraction (SMILE) in eyes of different myopia severity

IF 3.1 3区医学 Q2 ONCOLOGY

Photodiagnosis and Photodynamic Therapy Pub Date : 2024-11-04 DOI:10.1016/j.pdpdt.2024.104392

Li Jiang , Changting Tang , Bao Shu , Ying Liu , Qingyan Zeng , Xiaohua Lei , Zhengwei Shen , Yijun Hu

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Abstract

Purpose

To investigate the changes in posterior corneal elevation after small incision lenticule extraction (SMILE) surgery in eyes of different myopia severity.

Methods

A total of 141 eyes of 86 patients were recruited and followed at 1 month, 3 months, 6 months, and 12 months after SMILE surgery. The eyes were divided into four groups according to the spherical equivalent (SE): low myopia (LM, −3.00 D≤SE<−0.50 D, 35 eyes), moderate myopia (MM, −6.00 D≤SE<−3.00 D, 54 eyes) and high myopia (HM, −10.00 D≤SE<−6.00 D, 52 eyes). Posterior corneal elevation was measured by Pentacam HR. Posterior corneal apex elevation (PCAE), posterior maximum elevation (PME), and posterior elevation at the thinnest point of the cornea (TPC) in the central 4-mm area were recorded and compared among different examination time points in the same group or among different groups at the same time point.

Results

Uncorrected distance visual acuity (UDVA) at 12 months was 20/20 or better in 100.00 % of eyes in LM group, 100.00 % in MM group and 96.15 % in HM group (P > 0.05). There were significant reductions of post-operative PCAE compared to baseline in the LM group (P = 0.038) and HM group (P<0.001), and the reduction was marginally significant in the MM group (P = 0.076). No statistically significant changes in PME were observed after SMILE surgery in the three groups (all P > 0.05). TPC was significantly decreased after the surgery in the MM group (P = 0.022) and the HM group (P<0.001), and was marginally significantly decreased in the LM group (P = 0.063). There was no significant difference in PCAE and PME among the three groups at baseline or any postoperative timepoint (all P > 0.05). TPC was significantly different among the three groups at 3 months, 6 months and 12 months (all P < 0.05), but not at baseline (P = 0.066) or 1 month (P = 0.080).

Conclusion

In the first year after SMILE surgery, PCAE was decreased in both LM and HM eyes, and TPC were decreased in MM and HM eyes, but PME was stable after the surgery.

Abstract Image

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不同近视度数的眼睛在小切口人工晶体摘除术（SMILE）后角膜后部隆起的情况。

目的：研究不同近视度数的眼睛在接受小切口人工晶体摘除术（SMILE）后角膜后凸度的变化：方法：共招募了 86 名患者的 141 只眼睛，分别在 SMILE 手术后 1 个月、3 个月、6 个月和 12 个月进行随访。根据球面等效度数（SE）将患者分为四组：低度近视（LM，-3.00 D≤SEResults）：12个月后，低度近视组、高度近视组和中度近视组的未矫正远视力（UDVA）分别达到或超过20/20的比例分别为100.00%、100.00%和96.15%（P>0.05）。LM 组（P=0.038）和 HM 组（P0.05）术后 PCAE 与基线相比明显下降。MM组（P=0.022）和HM组（P0.05）术后TPC明显下降。在 3 个月、6 个月和 12 个月时，三组的 TPC 有明显差异（均为 PC）：SMILE手术后第一年，LM组和HM组的PCAE均下降，MM组和HM组的TPC均下降，但PME在术后保持稳定。

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来源期刊

Photodiagnosis and Photodynamic Therapy ONCOLOGY-

CiteScore

5.80

自引率

24.20%

发文量

509

审稿时长

50 days

期刊介绍： Photodiagnosis and Photodynamic Therapy is an international journal for the dissemination of scientific knowledge and clinical developments of Photodiagnosis and Photodynamic Therapy in all medical specialties. The journal publishes original articles, review articles, case presentations, "how-to-do-it" articles, Letters to the Editor, short communications and relevant images with short descriptions. All submitted material is subject to a strict peer-review process.