Martinez-de-la-Casa Jose M, Garcia-Feijoo Julian, Saenz-Frances Federico, Vizzeri Gianmarco, Fernandez-Vidal Ana, Mendez-Hernandez Carmen, Garcia-Sanchez Julian
Hospital Clinico San Carlos, Instituto de Investigaciones Oftalmologicas Ramon Castroviejo, Universidad Complutense, Madrid, Spain.
J Glaucoma. 2009 Jan;18(1):49-52. doi: 10.1097/IJG.0b013e31816f760c.
To compare intraocular pressure (IOP) measurements obtained using the rebound tonometer (RBT) and the handheld Goldmann applanation tonometer (Perkins) in children with congenital glaucoma.
Using both tonometers, the IOP was prospectively determined in 68 eyes of 68 patients with congenital glaucoma aged 3 to 13 years. Corneal curvature, central corneal thickness (CCT), and axial length were also measured in each patient. The ease of the use of each tonometer was scored using a visual analog scale.
IOP readings obtained using the RBT and Perkins tonometer showed good correlation (r=0.869, P<0.001) although RBT readings were consistently higher (mean difference: 3.1 +/-4.0 mm Hg). According to the Bland-Altman plot, the 95% limits of agreement between the 2 methods were -4.8 to 10.9 mm Hg (slope=0.589, P<0.001). When estimating CCT, the 2 tonometers behaved similarly and correlation was observed between IOP measurements and CCT, with higher IOPs obtained as the CCT increased. In contrast, no correlation was detected between corneal curvature or axial length and the IOPs recorded using either tonometer. Ease of use scores awarded by the examiner was higher for the RBT.
The RBT overestimates the IOP compared with the Perkins tonometer in patients with congenital glaucoma. Differences in readings between the 2 tonometers become larger as the CCT increases.
比较使用回弹式眼压计（RBT）和手持戈德曼压平眼压计（珀金氏眼压计）测量先天性青光眼患儿的眼压。
使用这两种眼压计，对68例年龄在3至13岁的先天性青光眼患者的68只眼睛进行前瞻性眼压测定。还测量了每位患者的角膜曲率、中央角膜厚度（CCT）和眼轴长度。使用视觉模拟量表对每种眼压计的易用性进行评分。
使用RBT和珀金氏眼压计获得的眼压读数显示出良好的相关性（r = 0.869，P < 0.001），尽管RBT读数始终较高（平均差异：3.1±4.0 mmHg）。根据布兰德-奥特曼图，两种方法之间的95%一致性界限为-4.8至10.9 mmHg（斜率 = 0.589，P < 0.001）。在估计CCT时，两种眼压计表现相似，并且在眼压测量值和CCT之间观察到相关性，随着CCT增加获得更高的眼压值。相比之下，未检测到角膜曲率或眼轴长度与使用任何一种眼压计记录的眼压之间存在相关性。检查者给予RBT的易用性评分更高。
在先天性青光眼患者中，与珀金氏眼压计相比，RBT高估了眼压。随着CCT增加，两种眼压计的读数差异变得更大。
