Vogel A, Beck S, Schwenn O, Grus F, Krummenauer F, Pfeiffer N
Universitäts-Augenklinik, Langenbeckstrasse 1, 55131 Mainz.
Ophthalmologe. 2001 Oct;98(10):944-9. doi: 10.1007/s003470170041.
SmartLens (ODC Ophthalmic Development Company AG, Zürich) is a contact lens tonometer, which allows continuous registration of intraocular pressure (IOP) and ocular pulse amplitude (OPA) and simultaneous ophthalmoscopy. The purpose of this study was to evaluate the intra- and interobserver variability and reliability of intraocular pressure and ocular pulse amplitude measurements using SmartLens.
To evaluate the intraobserver variability, intraocular pressure (IOP) and ocular pulse amplitude (OPA) were both measured 5 times in 10 healthy eyes by one observer. To evaluate the interobserver variability, intraocular pressure and ocular pulse amplitude were measured by 3 different observers in 10 healthy eyes. Data description is based on coefficients of variation (SD/mean in %), statistical inference on ANOVA-based reliability estimation.
The coefficient of the intraobserver variation was 9.57% for the IOP and 14.5% for the OPA (SD IOP: +/- 1.64 mmHg, SD OPA: +/- 0.39 mmHg). The coefficient of the interobserver variation with 5 replicate measurements was 10.16% for the IOP and 14% for the OPA (SD IOP: +/- 1.83 mmHg, SD OPA: +/- 0.4 mmHg). The interobserver reliability was 87% for the IOP and 86% for the OPA. One of the three observers obtained significantly higher IOP and OPA values.
SmartLens is a reasonably precise and reliable device for IOP as well as OPA measurements but the results were not found to be observer independent.
SmartLens（苏黎世ODC眼科发展公司）是一种隐形眼镜眼压计，可连续记录眼压（IOP）和眼脉搏振幅（OPA），并同时进行检眼镜检查。本研究的目的是评估使用SmartLens测量眼压和眼脉搏振幅时观察者内和观察者间的变异性及可靠性。
为评估观察者内变异性，一名观察者对10只健康眼睛的眼压（IOP）和眼脉搏振幅（OPA）各测量5次。为评估观察者间变异性，由3名不同观察者对10只健康眼睛测量眼压和眼脉搏振幅。数据描述基于变异系数（标准差/平均值，以%表示），统计推断基于方差分析的可靠性估计。
眼压的观察者内变异系数为9.57%，眼脉搏振幅为14.5%（眼压标准差：±1.64 mmHg，眼脉搏振幅标准差：±0.39 mmHg）。5次重复测量的观察者间变异系数，眼压为10.16%，眼脉搏振幅为14%（眼压标准差：±1.83 mmHg，眼脉搏振幅标准差：±0.4 mmHg）。眼压的观察者间可靠性为87%，眼脉搏振幅为86%。三名观察者中的一人获得的眼压和眼脉搏振幅值显著更高。
SmartLens是一种用于眼压及眼脉搏振幅测量的相当精确且可靠的设备，但结果并非与观察者无关。
