Scheimpflug 摄影法与光学低相干反射法测量儿童中央角膜厚度的一致性。

Agreement of Central Corneal Thickness Measurements between Scheimpflug Photography and Optical Low-Coherence Reflectometry in Children.

机构信息

Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital , Tehran, Iran.

Rehabilitation Research Center, Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences , Tehran, Iran.

出版信息

Semin Ophthalmol. 2020 May 18;35(4):252-256. doi: 10.1080/08820538.2020.1810288. Epub 2020 Aug 26.

DOI:10.1080/08820538.2020.1810288

PMID:32845784

Abstract

PURPOSE

Central corneal thickness (CCT) is a key indicator of the corneal health status and is therefore of clinical importance. The aim of the present study was to determine the agreement between Scheimpflug photography (SP) and optical low-coherence reflectometry (OLCR) systems in measuring the CCT in children.

METHODS

In this cross-sectional study, the samples were selected from Shahroud schoolchildren using cluster sampling. The samples then underwent optometric examinations, including the measurement of visual acuity and refraction. CCT measurements were done by the SP and OLCR systems between 8 am and 4 pm. To evaluate the agreement between these devices, 95% limits of agreement (LoA) and interclass correlation coefficient (ICC) were reported.

RESULTS

After applying the exclusion criteria, 4890 right eyes (53.2% male) were analyzed. The mean age of the students was 9.22 ± 1.72 years (range: 6-12 years). The mean CCT by the SP and OLCR systems was 555.30 ± 34.15 and 550.23 ± 35.11 µm, respectively. The 95% LoA between the two devices was -19.81 to 9.66 µm, and the ICC was 0.983. The CCT difference between the SP and OLCR systems was 5.61 µm in boys and 3.36 µm in girls. The CCT difference between the two devices was 6.41 µm in 6-year-old and 3.54 µm in 12-year-old children. The 95% LoA was -17.96 to 9.58 µm and -18.89 to 8.47 µm and the ICC was 0.987 and 0.984 in myopic and hyperopic subjects, respectively.

CONCLUSION

The results of this study showed a high agreement between OLCR and SP measurements of CCT in children.

摘要

目的

中央角膜厚度（CCT）是角膜健康状况的关键指标，因此具有临床重要性。本研究旨在确定 Scheimpflug 摄影（SP）和光学低相干反射计（OLCR）系统在测量儿童 CCT 方面的一致性。

方法

在这项横断面研究中，采用聚类抽样法从沙赫鲁德的学童中抽取样本。然后，对这些样本进行了包括视力和屈光度测量在内的眼科检查。在上午 8 点至下午 4 点之间，通过 SP 和 OLCR 系统测量 CCT。为了评估这些设备之间的一致性，报告了 95%的一致性界限（LoA）和组内相关系数（ICC）。

结果

应用排除标准后，对 4890 只右眼（53.2%为男性）进行了分析。学生的平均年龄为 9.22±1.72 岁（范围：6-12 岁）。SP 和 OLCR 系统测量的 CCT 平均值分别为 555.30±34.15 和 550.23±35.11 µm。两种设备之间的 95%LoA 为-19.81 至 9.66 µm，ICC 为 0.983。男孩的 SP 和 OLCR 系统之间的 CCT 差值为 5.61 µm，女孩为 3.36 µm。两种设备之间的 CCT 差值在 6 岁儿童中为 6.41 µm，在 12 岁儿童中为 3.54 µm。95%LoA 分别为-17.96 至 9.58 µm 和-18.89 至 8.47 µm，ICC 分别为 0.987 和 0.984，在近视和远视受试者中。