Munkwitz S, Elkarmouty A, Hoffmann E M, Pfeiffer N, Thieme H
Department of Ophthalmology, Johannes Gutenberg-University Mainz, Mainz, Germany.
Graefes Arch Clin Exp Ophthalmol. 2008 Jun;246(6):875-9. doi: 10.1007/s00417-007-0758-3. Epub 2008 Jan 12.
The aim of this study was to compare the intraocular pressure (IOP) results measured by the iCare rebound tonometer with those obtained by the Goldmann applanation tonometer (GAT) over a wide range of IOP values. Furthermore, the comfort level of the iCare measurement was evaluated.
The study included 75 eyes of 75 patients. The patients were divided into three groups (7-15 mmHg n = 25, 16-22 mmHg n = 25, 23-60 mmHg n = 25). The measurements were taken by two independent observers in a masked fashion. All patients were asked about discomfort during the iCare measurement. To establish the agreement between the two devices, a Bland-Altman analysis was performed.
Overall, the 95% confidence interval of the differences between the two devices was -8.67 to 10.25 mmHg and in 62.7%, the iCare measurement was within +/-3 mmHg of the GAT measurements. The distribution of the differences in IOP was similar, from 7-22 mmHg. In the higher IOP range (23-60 mmHg), however, the deviation was almost twice as large. The measurement with the iCare tonometer was well tolerated; 100% of the patients denied any discomfort.
The iCare tonometer is a mobile alternative to GAT in a low to moderate IOP range, but our findings show a greater deviation than previously reported. In high IOP values, measurements with the iCare tonometer do not correlate well with GAT.
本研究旨在比较iCare回弹式眼压计与Goldmann压平眼压计（GAT）在广泛眼压值范围内所测得的眼压结果。此外，还评估了iCare测量的舒适度。
该研究纳入了75例患者的75只眼。患者被分为三组（眼压7 - 15 mmHg，n = 25；眼压16 - 22 mmHg，n = 25；眼压23 - 60 mmHg，n = 25）。测量由两名独立观察者以盲法进行。所有患者均被询问iCare测量过程中的不适感。为确定两种设备之间的一致性，进行了Bland - Altman分析。
总体而言，两种设备测量结果差异的95%置信区间为 - 8.67至10.25 mmHg，62.7%的情况下，iCare测量值在GAT测量值的±3 mmHg范围内。眼压差异分布在7 - 22 mmHg范围内时较为相似。然而，在较高眼压范围（23 - 60 mmHg），偏差几乎是原来的两倍。使用iCare眼压计进行测量的耐受性良好；100%的患者否认有任何不适。
在低至中度眼压范围内，iCare眼压计是GAT的一种可移动替代设备，但我们的研究结果显示其偏差比先前报道的更大。在高眼压值时，iCare眼压计的测量结果与GAT的相关性不佳。
