眼科 ›› 2026, Vol. 35 ›› Issue (5): 399-404.doi: 0.13281/j.cnki.issn.1004-4469.2026.05.009

• 论著 • 上一篇    下一篇

WaveLight EX500准分子激光治疗性角膜切削术后的屈光变化及影响因素

胡晓丹  张青蔚  李上  翟长斌  接英   

  1. 首都医科大学附属北京同仁医院  北京同仁眼科中心  眼科学与视觉科学北京市重点实验室,北京 100730
  • 收稿日期:2025-04-16 出版日期:2026-09-25 发布日期:2026-09-18
  • 通讯作者: 接英,Email: jie_yingcn@aliyun.com

Refractive changes and associated factors after WaveLight EX500 excimer laser phototherapeutic keratectomy

Hu Xiaodan, Zhang Qingwei, Li Shang, Zhai Changbin, Jie Ying   

  1. Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University; Beijing Key Laboratory of Ophthalmology and Visual Sciences, Beijing 100730, China
  • Received:2025-04-16 Online:2026-09-25 Published:2026-09-18
  • Contact: Jie Ying, Email: jie_yingcn@aliyun.com

摘要: 目的 评价WaveLight EX500准分子激光器行准分子激光治疗性角膜切削术(phototherapeutic keratectomy,PTK)的屈光变化及其影响因素。设计  回顾性病例系列。研究对象 2023年4月至2024年4月北京同仁医院眼科使用WaveLight EX500准分子激光器行PTK的患者11 例14眼。方法 回顾患者的病历资料。分析切削深度(ablation depth,AD)、光学区直径(optical zone,OZ)及其他临床因素与△SEQ的相关性,并采用多元线性回归分析其独立影响因素。主要指标 术后3个月等效球镜(spherical equivalent,SEQ)的变化(△SEQ)。结果 14眼的平均AD为(41.50±30.68)μm,平均OZ为(6.75±0.91)mm,术后3个月SEQ由(-1.77±3.17)D变为(-2.37±3.35)D,△SEQ为(-0.60±1.06)D,呈近视漂移趋势,但术前与术后SEQ差异无统计学意义(P=0.054)。相关分析显示△SEQ与AD显著相关(r=-0.733,P=0.003),与OZ、年龄、术前角膜中央上皮厚度及术前SEQ均无显著相关性。多元线性回归分析显示AD与OZ均为影响△SEQ的独立相关因素(P均<0.05),回归方程为:△SEQ=-2.739-0.033×AD+0.521×OZ,模型拟合良好(R2=0.687)。随访期间无并发症发生。结论 WaveLight EX500准分子激光PTK术后3个月SEQ较术前降低,整体呈近视漂移趋势;切削深度和光学区直径是术后屈光变化的独立相关因素,其中切削深度越大,近视漂移越明显,而光学区直径越大,近视漂移幅度越小。

关键词: 准分子激光治疗性角膜切削术, 近视漂移

Abstract:  Objective To evaluate refractive changes and associated factors after phototherapeutic keratectomy (PTK) using the WaveLight EX500 excimer laser. Design Retrospective case series. Participants 11 Patients (14 eyes) who underwent PTK using the WaveLight EX500 excimer laser at the Department of Ophthalmology, Beijing Tongren Hospital, between April 2023 and April 2024. Methods The patient's medical records were reviewed. The associations between ΔSEQ and clinical variables, including ablation depth (AD), optical zone (OZ), and other factors, were analyzed. Multivariate linear regression was performed to identify independent predictors of refractive change. Main Outcome Measures The change in spherical equivalent (SEQ)at 3 months postoperatively (ΔSEQ). Results The mean AD in all 11 patients (14 eyes) was 41.50±30.68 μm, and the mean OZ was 6.75±0.91mm. At 3 months postoperatively, the SEQ changed from -1.77±3.17 D to -2.37±3.35 D, with ΔSEQ of -0.60±1.06 D, indicating a trend toward myopic shift; however, the difference in SEQ between preoperative and postoperative measurements was not statistically significant (P=0.054). Correlation analysis showed a significant association between ΔSEQ and AD (r=-0.733, P=0.003), while no significant correlations were found with OZ, age, preoperative central corneal epithelial thickness, or preoperative SEQ. Multivariate linear regression demonstrated that both AD and OZ were independently associated factors of ΔSEQ (both P<0.05). The regression equation was: ΔSEQ=-2.739-0.033×AD+0.521×OZ, with good model fit (R2=0.687). No postoperative complications were observed during follow-up. Conclusion The spherical equivalent decreased at 3 months after PTK using the WaveLight EX500 excimer laser, indicating an overall trend toward a myopic shift. Ablation depth and optical zone diameter were independently associated with postoperative refractive change, with greater ablation depth associated with a greater myopic shift and a larger optical zone associated with a smaller magnitude of myopic shift.

Key words:  Phototherapeutic keratectomy, Myopic shift