Ogbuehi Kelechi C
Department of Optometry and Vision Sciences, College of Applied Medical Sciences, Riyadh, Kingdom of Saudi Arabia.
Clin Exp Optom. 2006 Sep;89(5):310-4. doi: 10.1111/j.1444-0938.2006.00068.x.
The reliability of non-contact tonometers has been reported extensively in the literature. This study was designed to assess reliability of the new Topcon CT80 non-contact tonometer in normotensive subjects, using the Goldmann tonometer as the standard.
The accuracy of the Topcon CT 80 non-contact tonometer was assessed by comparing its IOP assessments with those of the Goldmann applanation tonometer, on 60 right eyes of young healthy subjects with normal intraocular pressures. Each subject's intraocular pressure was assessed with each technique on two separate occasions, one week apart. The reliability of each technique was determined by the assessment of its inter-session repeatability using the Bland-Altman method. The 95 per cent limits of agreement for the two methods were also determined.
No statistically significant difference was found between the average intraocular pressures measured with the two techniques (p > 0.05). The inter-session repeatability indices for the two techniques did not differ significantly (p > 0.05). The mean difference in intraocular measurements between the two techniques was 0.2 +/- 1.5 mmHg (mean +/- SD) and the 95 per cent limits of agreement were -3.14 and +2.74 mmHg, with the non-contact tonometer returning higher readings than the Goldmann tonometer.
In this sample of normotensive subjects, the Topcon CT80 non-contact tonometer proved to be accurate and as reliable as the Goldmann tonometer in the assessment of intraocular pressure. Thus, it can be used as an objective clinical method for the assessment of normal intraocular pressure.
非接触眼压计的可靠性在文献中已有广泛报道。本研究旨在以Goldmann眼压计作为标准，评估新型拓普康CT80非接触眼压计在血压正常受试者中的可靠性。
通过比较拓普康CT80非接触眼压计与Goldmann压平眼压计对60只眼压正常的年轻健康受试者右眼的眼压评估，来评估拓普康CT80非接触眼压计的准确性。每种技术在两个不同时间对每位受试者的眼压进行评估，间隔一周。使用Bland-Altman方法通过评估其测量间期重复性来确定每种技术的可靠性。还确定了两种方法的95%一致性界限。
两种技术测量的平均眼压之间未发现统计学上的显著差异（p>0.05）。两种技术的测量间期重复性指标无显著差异（p>0.05）。两种技术测量的眼压平均差异为0.2±1.5 mmHg（平均值±标准差），95%一致性界限为-3.14至+2.74 mmHg，非接触眼压计的读数高于Goldmann眼压计。
在这个血压正常受试者样本中，拓普康CT80非接触眼压计在眼压评估中被证明是准确的，并且与Goldmann眼压计一样可靠。因此，它可以用作评估正常眼压的客观临床方法。
