一种新型眼压计——Corvis ST 眼压计：与非接触式眼压计和 Goldmann 压平眼压计的临床比较。

A new tonometer--the Corvis ST tonometer: clinical comparison with noncontact and Goldmann applanation tonometers.

机构信息

Department of Ophthalmology, Eye, Ear, Nose, and Throat Hospital, School of Shanghai Medicine, Fudan University, Shanghai, China.

出版信息

Invest Ophthalmol Vis Sci. 2013 Jan 23;54(1):659-65. doi: 10.1167/iovs.12-10984.

DOI:10.1167/iovs.12-10984

PMID:23307970

Abstract

PURPOSE

To compare intraocular pressure (IOP) measurements obtained using the Topocon noncontact tonometer (NCT), the Goldmann applanation tonometer (GAT), and the Corvis ST (CST), a newly developed tonometer with features of visualization and measurement of the corneal deformation response to an air impulse. A secondary objective was to assess the agreement among the devices.

METHODS

Fifty-nine participants, including glaucoma patients (36 cases) and control volunteers (23 cases), were enrolled. One eye was selected randomly for further study. IOP measurements were obtained with the CST, NCT, and GAT by two experienced clinicians. IOP values were compared. Intraobserver variability and interobserver variability were assessed by the coefficient of variation and intraclass correlation coefficient. Device agreement was calculated by Bland-Altman analysis.

RESULTS

Mean IOP for all examined eyes was 18.9 ± 5.8 mm Hg for CST, 21.3 ± 6.8 mm Hg for NCT, and 20.3 ± 5.7 mm Hg for GAT. There was no statistically significant difference in IOP measurements among the tonometers except between the CST and NCT. Correlation analysis showed a high correlation between each pair of devices (all P < 0.001). The CST displayed the best intraobserver variability and interobserver variability. Bland-Altman analysis revealed a bias between CST and GAT, CST and NCT, and GAT and NCT of -1.3, -2.4, and -1.1 mm Hg, with 95% limits of agreement of -6.2 to 3.5 mm Hg, -10.1 to 5.2 mm Hg, and -8.3 to 6.2 mm Hg, respectively.

CONCLUSIONS

The CST offers an alternative method for measuring IOP. IOP measurements taken with these devices may not be interchangeable.

摘要

目的

比较使用 Topocon 非接触眼压计（NCT）、Goldmann 压平眼压计（GAT）和 Corvis ST（CST）测量的眼压，CST 是一种新开发的眼压计，具有可视化和测量角膜对空气脉冲变形反应的功能。次要目的是评估这些设备之间的一致性。

方法

共纳入 59 名参与者，包括青光眼患者（36 例）和对照组志愿者（23 例）。每只眼随机选择一只进行进一步研究。由两名有经验的临床医生使用 CST、NCT 和 GAT 进行眼压测量。比较眼压值。通过变异系数和组内相关系数评估观察者内和观察者间的可变性。通过 Bland-Altman 分析计算设备间的一致性。

结果

所有受检眼的平均眼压分别为 CST 为 18.9 ± 5.8mmHg、NCT 为 21.3 ± 6.8mmHg 和 GAT 为 20.3 ± 5.7mmHg。除 CST 和 NCT 之间外，眼压测量值在眼压计之间无统计学差异。相关性分析显示，每种设备之间均具有高度相关性（均 P<0.001）。CST 显示出最佳的观察者内和观察者间可变性。Bland-Altman 分析显示 CST 和 GAT、CST 和 NCT 以及 GAT 和 NCT 之间的偏差分别为-1.3mmHg、-2.4mmHg 和-1.1mmHg，95%一致性界限分别为-6.2 至 3.5mmHg、-10.1 至 5.2mmHg 和-8.3 至 6.2mmHg。