Toker Mustafa Ilker, Vural Ayse, Erdogan Haydar, Topalkara Aysen, Arici Mustafa Kemal
Department of Ophthalmology, Cumhuriyet University School of Medicine, 58140 Sivas, Turkey.
Graefes Arch Clin Exp Ophthalmol. 2008 Jun;246(6):881-9. doi: 10.1007/s00417-008-0769-8. Epub 2008 Feb 20.
To examine the effects of central corneal thickness on the measures obtained from transpalpebral tonometry (Diaton), and to identify correlations between intraocular pressure (IOP) measurements with Diaton and the Goldmann applanation tonometer (GAT).
In this cross-sectional study, 162 eyes of 81 participants were included. Intraocular pressure measurements were obtained in all patients using Diaton and GAT. Central corneal thickness was determined by ultrasound pachymetry. The participants were stratified by corneal thickness: group I <530 microm (n = 56), group II 530-560 microm (n = 65), and group III >560 microm (n = 41).
There were moderate correlations between IOP readings obtained using the Diaton and corrected GAT (C-GAT) (r = 0.303; P < 0.0001), and between corrected Diaton (C-Diaton), and C-GAT (r = 0.399; P < 0.0001). The mean Diaton tonometer readings were lower than C-GAT measurements (Diaton-corrected GAT mean difference, 0.9 +/- 3.8 mmHg; c-Diaton-corrected GAT mean difference, 0.7 +/- 3.5 mmHg). Differences were detected between the groups of patients for the GAT values [2.4 +/- 3.6 mmHg for those with the thinnest corneas (<530 microm), 0.7 +/- 3.6 mmHg for those with moderate corneas (between 531 microm and 560 microm), and -0.6 +/- 3.6 mmHg for those with the thickest (>560 microm) corneas], whereas a significantly lower difference (0.9 +/- 3.8 mmHg) was noted for the Diaton values of all individuals.
The Diaton measurements show moderate correlation with those provided by applanation tonometry. The Diaton tonometer seems to be more affected by the corneal thickness, especially in the thinnest corneas.
研究中央角膜厚度对经睑眼压测量仪（Diaton）测量结果的影响，并确定Diaton眼压测量值与Goldmann压平眼压计（GAT）测量值之间的相关性。
在这项横断面研究中，纳入了81名参与者的162只眼睛。所有患者均使用Diaton和GAT测量眼压。通过超声测厚法测定中央角膜厚度。参与者按角膜厚度分层：I组<530微米（n = 56），II组530 - 560微米（n = 65），III组>560微米（n = 41）。
使用Diaton和校正后的GAT（C - GAT）获得的眼压读数之间存在中度相关性（r = 0.303；P < 0.0001），校正后的Diaton（C - Diaton）与C - GAT之间也存在中度相关性（r = 0.399；P < 0.0001）。Diaton眼压计的平均读数低于C - GAT测量值（Diaton - 校正后GAT平均差值为0.9±3.8 mmHg；C - Diaton - 校正后GAT平均差值为0.7±3.5 mmHg）。在不同组别的患者中，GAT值存在差异[角膜最薄（<530微米）的患者为2.4±3.6 mmHg，角膜中度厚度（531微米至560微米之间）的患者为0.7±3.6 mmHg，角膜最厚（>560微米）的患者为 - 0.6±3.6 mmHg]，而所有个体的Diaton值差异显著更低（0.9±3.8 mmHg）。
Diaton测量值与压平眼压测量值显示出中度相关性。Diaton眼压计似乎受角膜厚度影响更大，尤其是在最薄的角膜中。
