López-Caballero C, Contreras I, Muñoz-Negrete F J, Rebolleda G, Cabrejas L, Marcelo P
Departamento de Glaucoma, Servicio de Oftalmología, Hospital Ramón y Cajal, Universidad de Alcalá, Madrid, España.
Arch Soc Esp Oftalmol. 2007 May;82(5):273-8. doi: 10.4321/s0365-66912007000500005.
Rebound tonometry has recently been modified for its use in humans. The purpose of our study was to determine the precision of the ICare(R) rebound tonometer (RBT) as compared with the Goldmann applanation tonometer (GAT).
Patients were recruited from our Hospital's Glaucoma Unit. In each patient, intraocular pressure (IOP) was measured without anaesthesia using the RBT and ten minutes later using the GAT. Central corneal thickness (CCT) was measured by pachymetry.
Sixty-eight patients were recruited (132 eyes). Mean IOP readings with RBT were 18.9 +/- 7.2 (SD) mmHg and were 15.5 +/- 5.7 mmHg with GAT (p<0.001). There was a good correlation between both instruments (r = 0.87, p<0.001). In most cases (84.6%) the IOP measured with the RBT was greater than that measured with the GAT. The mean difference between both instruments was 3.4 +/- 3.6 mmHg. There was a trend towards greater differences between those obtained using the RBT than the GAT when IOP values were higher. A statistically significant correlation was found between IOP readings with both tonometers and CCT, with higher differences being seen as the CCT increased.
The RBT can be employed in a clinical setting taking into account that it usually overestimates IOP as compared with the GAT. It could be especially useful in glaucoma screening campaigns since it can be operated by a trained technician.
回弹式眼压计最近已针对其在人体中的应用进行了改进。我们研究的目的是确定与Goldmann压平眼压计（GAT）相比，ICare回弹眼压计（RBT）的精度。
从我院青光眼科招募患者。对每位患者在未麻醉状态下先用RBT测量眼压，10分钟后再用GAT测量眼压。通过角膜测厚法测量中央角膜厚度（CCT）。
共招募了68例患者（132只眼）。RBT测得的平均眼压读数为18.9±7.2（标准差）mmHg，GAT测得的为15.5±5.7 mmHg（p<0.001）。两种仪器之间存在良好的相关性（r = 0.87，p<0.001）。在大多数情况下（84.6%），用RBT测得的眼压高于用GAT测得的眼压。两种仪器之间的平均差值为3.4±3.6 mmHg。当眼压值较高时，使用RBT测得的眼压与使用GAT测得的眼压之间的差异有增大的趋势。两种眼压计测得的眼压读数与CCT之间存在统计学上的显著相关性，随着CCT增加，差异更大。
考虑到与GAT相比，RBT通常会高估眼压，因此RBT可用于临床环境。它在青光眼筛查活动中可能特别有用，因为它可以由经过培训的技术人员操作。
