Ivey Eye Institute, St. Joseph Healthcare, London, Ont.
Department of Ophthalmology, Western University, London, Ont.
Can J Ophthalmol. 2023 Oct;58(5):426-432. doi: 10.1016/j.jcjo.2022.06.002. Epub 2022 Jul 6.
To evaluate the relationship between the Goldmann applanation tonometer (GAT) and the iCare PRO and iCare IC200 tonometers in measuring intraocular pressure (IOP) in adult eyes with a diagnosis of glaucoma or glaucoma suspect.
One hundred and one eyes from 101 participants diagnosed with glaucoma or glaucoma suspect were evaluated in this study. IOP was measured by iCare PRO and iCare IC200 tonometers in a randomized sequence followed by IOP measurements by the GAT tonometer and then central corneal thickness measurements. After the IOP measurements, participants scored their comfort level using a visual analog scale with each tonometer. Intraclass correlation coefficient (ICC) and Bland-Altman analysis were used to investigate the agreement among tonometers. SPSS and Microsoft Excel programs were used for statistical analysis.
Overall, there was good agreement among the 3 tonometers used in this study. The ICC for the iCare PRO and the iCare IC200 was 0.95 (p < 0.001), and the ICC for the iCare PRO and the GAT and the iCare IC200 and the GAT was >0.80 (p < 0.001). However, both iCare tonometers underestimated IOP by approximately 2 mm Hg compared with the GAT. Furthermore, 84% of iCare readings fall within ±5 mm Hg of GAT measurements. Neither body mass index nor central corneal thickness affected the IOP agreement among the tonometers. Participant response on visual analog scale rated IOP measurements by iCare tonometers to be more comfortable than the GAT.
Our results demonstrated a good agreement between iCare tonometers and GAT; but iCare tonometers underestimated IOP compared to the GAT.
评估 Goldmann 压平眼压计（GAT）与 iCare PRO 和 iCare IC200 眼压计在测量诊断为青光眼或疑似青光眼的成人眼内眼压（IOP）方面的关系。
本研究评估了 101 名被诊断为青光眼或疑似青光眼的患者的 101 只眼。IOP 依次通过 iCare PRO 和 iCare IC200 眼压计随机测量，然后进行中央角膜厚度测量。IOP 测量后，每位参与者使用视觉模拟量表对每个眼压计的舒适度进行评分。使用组内相关系数（ICC）和 Bland-Altman 分析评估眼压计之间的一致性。使用 SPSS 和 Microsoft Excel 程序进行统计分析。
总体而言，本研究中使用的 3 种眼压计之间具有良好的一致性。iCare PRO 和 iCare IC200 的 ICC 为 0.95（p < 0.001），iCare PRO 和 GAT 以及 iCare IC200 和 GAT 的 ICC 均>0.80（p < 0.001）。然而，与 GAT 相比，iCare 两种眼压计均低估了约 2mmHg 的 IOP。此外，84%的 iCare 读数落在 GAT 测量值的±5mmHg 范围内。体重指数和中央角膜厚度均不会影响眼压计之间的 IOP 一致性。参与者对视觉模拟量表的反应表明，iCare 眼压计测量的 IOP 比 GAT 更舒适。
我们的研究结果表明 iCare 眼压计与 GAT 之间具有良好的一致性；但 iCare 眼压计与 GAT 相比低估了 IOP。
