Schreiber W, Vorwerk C K, Langenbucher A, Behrens-Baumann W, Viestenz A
Augenklinik mit Poliklinik, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland.
Ophthalmologe. 2007 Apr;104(4):299-304. doi: 10.1007/s00347-007-1487-z.
Goldmann applanation tonometry and dynamic contour tonometry (PASCAL) are two well established slit lamp mounted tonometric methods. Intraocular pressure measurement in bedridden patients and children is often only possible using hand held tonometers (TonoPenXL, Perkins tonometer, Draeger tonometer). This study was performed to evaluate the hand held ICare tonometer, which is based on the rebound method.
A total of 102 eyes were examined by two highly experienced ophthalmologists for: 1) ophthalmological status, 2) central corneal power (Zeiss IOL-Master), 3) central corneal thickness (Tomey ultrasound pachymetry, five successive measurements, SD<5%), 4) intraocular pressure (IOP) measurement with the Goldmann applantation tonometer (GAT) 1x, 5) TonoPenXL (1x), 6) ICare with three successive measurement series of 6 single measurements.
The mean IOP(GAT) was 13.2+/-3.0 mmHg compared with the mean IOP(TonoPenXL) (13.4+/-3.1 mmHg) and with the IOP(ICare) (mean value of first measurement series: 13.4+/-3.1 mmHg). The series of measurements with the ICare showed a tonography effect (decrease of IOP from 14.6 mmHg at the first measurement and 14.2 mmHg at the second to 14.0 at the third measurement). The ICare-measurements were highly reliable (Cronbach's alpha=0.974) and showed a good correlation between the measurement series (r=0.592-0.642; p<0.001). There was a great intra-individual variability of up to 17 mmHg between the GAT, TonoPenXL and ICare methods.
The ICare tonometer is easy to handle and high reliability. The data are comparable with those from the Goldmann tonometer. A tonography effect of 0.6 mmHg in the successive measurement series was found.
Goldmann压平眼压计和动态轮廓眼压计（PASCAL）是两种成熟的安装在裂隙灯上的眼压测量方法。卧床患者和儿童的眼压测量通常只能使用手持眼压计（TonoPenXL、Perkins眼压计、Draeger眼压计）。本研究旨在评估基于回弹法的手持ICare眼压计。
两位经验丰富的眼科医生对102只眼睛进行了检查，检查内容包括：1）眼科状况；2）中央角膜屈光力（蔡司IOL-Master）；3）中央角膜厚度（Tomey超声角膜测厚仪，连续测量5次，标准差<5%）；4）使用Goldmann压平眼压计（GAT）测量眼压（1次）；5）使用TonoPenXL测量眼压（1次）；6）使用ICare眼压计进行3个连续测量系列，每个系列6次单次测量。
GAT测量的平均眼压为13.2±3.0 mmHg，TonoPenXL测量的平均眼压为（13.4±3.1 mmHg），ICare测量的平均眼压（第一个测量系列的平均值：13.4±3.1 mmHg）。ICare眼压计的测量系列显示出眼压描记效应（眼压从第一次测量时的14.6 mmHg、第二次测量时的14.2 mmHg降至第三次测量时的14.0 mmHg）。ICare眼压计的测量结果高度可靠（Cronbach's alpha=0.974），且测量系列之间具有良好的相关性（r=0.592-0.642；p<0.001）。GAT、TonoPenXL和ICare三种测量方法之间个体内差异高达17 mmHg。
ICare眼压计操作简便且可靠性高。其数据与Goldmann眼压计的数据具有可比性。在连续测量系列中发现了0.6 mmHg的眼压描记效应。
