Department of Ophthalmology, School of Medicine, University of Occupational and Environmental Health, Japan.
J Glaucoma. 2012 Jan;21(1):35-40. doi: 10.1097/IJG.0b013e31820275b4.
The purpose of this study was threefold. We sought to compare the intraocular pressure (IOP) measured by dynamic contour tonometry (DCT) with that measured by Goldmann applanation tonometry (GAT) and noncontact tonometry (NCT). We also examined the influence of central corneal thickness (CCT) and corneal curvature radius (CCR) on the IOP measurements. Last, we investigated the factors that could affect the ocular pulse amplitude (OPA) measurements.
Seventy-four patients with no history of intraocular surgery were enrolled in this study. We measured IOP by DCT, GAT, and NCT, and the CCT, CCR, and axial length (AL) in the right eye of each patient. We also measured OPA by DCT. We subsequently analyzed the correlation of IOP measurements between GAT and DCT and between NCT and DCT. We also examined the influence of CCT, CCR, and AL on IOP readings by the 3 tonometers. In addition, we investigated the factors that could affect the OPA measurements.
The mean IOP measured by DCT was 2.8 mm Hg higher than that by GAT and 3.2 mm Hg higher than that by NCT. This difference was greater with thinner CCT in the lower IOP group than in the higher IOP group. IOP measurements by both GAT and NCT significantly correlated with CCT; however, IOP measurement by DCT did not correlate with CCT. No significant correlations were shown between the IOP measured by each of the 3 tonometers and either CCR or AL. OPA measurements positively correlated with age, IOP measurement by DCT, and pulse pressure.
IOP measured by DCT correlates with IOP measured by GAT or NCT with a roughly 3.0 mm Hg higher value, and these differences were greater in the patients with a thinner CCT. IOP measurements by both GAT and NCT significantly correlated with CCT; however, IOP measurement by DCT did not correlate with CCT. Our findings also indicate that OPA measured using DCT shows a positive correlation with patient age, IOP measurement by DCT, and pulse pressure.
本研究旨在达到三个目的。我们旨在比较动态轮廓眼压计（DCT）测量的眼压（IOP）与 Goldmann 压平眼压计（GAT）和非接触眼压计（NCT）测量的眼压。我们还研究了中央角膜厚度（CCT）和角膜曲率半径（CCR）对眼压测量的影响。最后，我们研究了可能影响眼脉冲幅度（OPA）测量的因素。
本研究纳入了 74 例无眼内手术史的患者。我们对每例患者的右眼分别用 DCT、GAT 和 NCT 测量眼压，同时测量 CCT、CCR 和眼轴（AL）。我们还用 DCT 测量 OPA。随后，我们分析了 GAT 与 DCT 之间以及 NCT 与 DCT 之间的 IOP 测量值的相关性。我们还研究了 CCT、CCR 和 AL 对 3 种眼压计眼压读数的影响。此外，我们研究了可能影响 OPA 测量的因素。
DCT 测量的平均眼压比 GAT 高 2.8mmHg，比 NCT 高 3.2mmHg。在较低眼压组，这种差异比在较高眼压组更为明显，CCT 更薄。GAT 和 NCT 测量的眼压均与 CCT 显著相关；然而，DCT 测量的眼压与 CCT 不相关。3 种眼压计测量的眼压与 CCR 或 AL 均无显著相关性。OPA 测量值与年龄、DCT 测量的眼压和脉搏压呈正相关。
DCT 测量的眼压与 GAT 或 NCT 测量的眼压大致相差 3.0mmHg，在 CCT 较薄的患者中差异更大。GAT 和 NCT 测量的眼压均与 CCT 显著相关；然而，DCT 测量的眼压与 CCT 不相关。我们的研究结果还表明，DCT 测量的 OPA 与患者年龄、DCT 测量的眼压和脉搏压呈正相关。
