Department of Ophthalmology, University of Bern, Inselspital, Bern 3010, Switzerland.
Br J Ophthalmol. 2012 Jan;96(1):42-6. doi: 10.1136/bjo.2010.182469. Epub 2011 Apr 3.
BACKGROUND/AIMS: The classic Goldmann applanation tonometer (GAT) has been further developed by Haag-Streit International. The applanation principle has been retained, while the internal force transmission and the pressure gauging have been optimised, the display of results digitised. The authors compared the GAT standard with the new GAT digital.
Four fixed tonometer pairs were used. The protocol included: non-contact pachymetry, slit-lamp examination, three consecutive measurements with each tonometer with a 5 min interval in between, check for side effects in 15 min. Three groups (intraocular pressure (IOP) levels) were defined: (1) IOP ≤ 16; (2) IOP>16 and <23; (3) IOP ≥ 23 mm Hg.
125 Patients (250 eyes) were evaluated. IOP (mm Hg), GAT standard versus GAT digital, for the rights eyes was: Group 1: 12.94 ± 0.55 versus 13.11 ± 0.53, p=0.71. Group 2: 18.26 ± 0.59 versus 18.03 ± 0.52, p=0.53; Group 3: 30.28 ± 0.48 versus 30.42 ± 0.41, p=0.97; all right eyes: 17.48 ± 7.48 versus 17.73 ± 7.4, p=0.99. For the left eyes, there was no significant difference, either. The correlation was very good and was not influenced by the IOP level. The Pearson coefficient for the right eye was 0.985, and for the left eye 0.994. In the Bland-Altman analysis, although there were two single readings that differed by as much as 5 mm Hg, GAT digital measures showed almost no skew, and the mean difference was 0.03 ± 1.23 mm Hg (n=250). A multiple regression analysis showed no influence of order of measurement, eyeside or pachymetry.
The new GAT digital is as reliable and safe as GAT standard. IOP values correlate well. It offers a digitised display and a wireless transfer of data. The display of values up to the first decimal digit is not necessarily associated with a more precise measurement, but may offer an additional comfort compared with the 2 mm Hg scale of the classic GAT.
背景/目的：海夫斯特赖特国际公司对经典的戈尔曼压平眼压计（GAT）进行了进一步开发。保持了压平原理，同时优化了内部力传递和压力测量，结果显示数字化。作者将 GAT 标准与新的 GAT 数字进行了比较。
使用四对固定眼压计。该方案包括：非接触式测厚仪、裂隙灯检查、每台眼压计连续测量三次，每次间隔 5 分钟，15 分钟检查副作用。分为三组（眼压（IOP）水平）：（1）IOP≤16；（2）IOP>16 且<23；（3）IOP≥23mmHg。
评估了 125 名患者（250 只眼）。右眼的眼压（mmHg），GAT 标准与 GAT 数字，组 1：12.94±0.55 与 13.11±0.53，p=0.71。组 2：18.26±0.59 与 18.03±0.52，p=0.53；组 3：30.28±0.48 与 30.42±0.41，p=0.97；所有右眼：17.48±7.48 与 17.73±7.4，p=0.99。左眼也没有显著差异。相关性非常好，不受 IOP 水平影响。右眼的 Pearson 系数为 0.985，左眼为 0.994。在 Bland-Altman 分析中，尽管有两个单独的读数相差 5mmHg，但 GAT 数字测量几乎没有偏斜，平均差异为 0.03±1.23mmHg（n=250）。多元回归分析显示测量顺序、眼别或测厚仪均无影响。
新型 GAT 数字与 GAT 标准一样可靠、安全。IOP 值相关性良好。它提供了数字化显示和数据的无线传输。值显示到第一位小数位不一定与更精确的测量相关，但与经典 GAT 的 2mmHg 刻度相比，可能提供额外的舒适度。
