Wang Shulin, Cheng Dan, Zhu Xueying, Bao Fangjun, Zhu Jun, Pang Chenjiu, Ye Yufeng
Department of Ophthalmology, Henan Provincial People's Hospital, Zhengzhou, Henan, China.
National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, 618# Fengqi East Road, Hangzhou, 310000, Zhejiang, China.
Graefes Arch Clin Exp Ophthalmol. 2025 Jan 29. doi: 10.1007/s00417-025-06746-4.
To calculate the crystalline lens power and astigmatism, as well as their changes following cycloplegia, in individuals with myopia using swept-source optical coherence tomography (SS-OCT).
Participants were divided into two groups according to axial length (AL). Crystalline lens parameters, including power, lens thickness (LT), anterior chamber depth (ACD), and astigmatism, were measured with SS-OCT and analysed before and after cycloplegia. The lensmaker's equation was used to calculate lens power, and differences between three consecutive measurements < 22.5 degrees was set as the screening criterion for meridian direction measurement repeatability.
Sixty-three eyes met the screening criterion on the anterior surface both before and after cycloplegia was included. The majority of eyes exhibited lens astigmatism ranging from + 0.76 D to + 1.50 D on both anterior and posterior surfaces. Before cycloplegia, 61 eyes (96.8%) had with-the-rule (WTR) astigmatism on the anterior surface. Meanwhile, 25 eyes met the criterion on posterior surface, of which 21 eyes (84.0%) had against-the-rule (ATR) astigmatism. After cycloplegia, 60 eyes (95.2%) had WTR astigmatism on the anterior surface. Meanwhile, 23 eyes met the criterion on posterior surface, of which 19 eyes (82.6%) had ATR astigmatism. After cycloplegia, there were significant changes in the lens power, astigmatism, thickness, and ACD.
Astigmatism of crystalline lens on the anterior and posterior surfaces was mainly WTR and ATR, respectively, with similar refractive power. After cycloplegia, changes in parameters and refractive power of the lens mainly occur on the anterior surface.
使用扫频光学相干断层扫描（SS-OCT）计算近视患者的晶状体屈光力和散光，以及睫状肌麻痹后的变化。
根据眼轴长度（AL）将参与者分为两组。使用SS-OCT测量晶状体参数，包括屈光力、晶状体厚度（LT）、前房深度（ACD）和散光，并在睫状肌麻痹前后进行分析。使用透镜制造商公式计算晶状体屈光力，将连续三次测量之间的差异<22.5度作为子午线方向测量重复性的筛选标准。
63只眼在睫状肌麻痹前后均符合前表面的筛选标准。大多数眼睛的前后表面晶状体散光范围为+0.76 D至+1.50 D。睫状肌麻痹前，61只眼（96.8%）前表面为顺规散光。同时，25只眼符合后表面标准，其中21只眼（84.0%）为逆规散光。睫状肌麻痹后，60只眼（95.2%）前表面为顺规散光。同时，23只眼符合后表面标准，其中19只眼（82.6%）为逆规散光。睫状肌麻痹后，晶状体屈光力、散光、厚度和ACD均有显著变化。
晶状体前后表面的散光分别主要为顺规和逆规，屈光力相似。睫状肌麻痹后，晶状体参数和屈光力的变化主要发生在前表面。
