- 作者：Gabor Nemeth ; Attila Vajas ; Alexis Tsorbatzoglou ; Bence Kolozsvari ; Jr. ; Laszlo Modis ; Andras Berta
- 刊名：Journal of Cataract and Refractive Surgery
- 出版年：2007
- 出版时间：March 2007
- 年：2007
- 卷：33
- 期：3
- 页码：443-447
- 全文大小：202 K
Purpose
To measure anterior chamber depth (ACD) with an anterior segment optical coherence tomography (AS-OCT) and a standard ultrasonic (US) axial scan (A-scan) device using an immersion technique and to assess repeatability, reproducibility, and correlations of the measurements.Setting
Department of Ophthalmology, Medical Health and Science Center, University of Debrecen, Debrecen, Hungary.
Methods
Sixty healthy eyes of 41 patients were enrolled in a study. The central ACD was measured 5 times with AS-OCT (Visante, Carl Zeiss Meditec) using its chamber tool and 5 times with a US A-scan device (UltraScan Imaging System, Alcon Laboratories) using an immersion method. The measurements were performed consecutively by 2 independent observers.
Results
The mean ACD measured with AS-OCT was 3.12 mm ± 0.33 (SD) by observer 1 and 3.11 ± 0.33 mm by observer 2 (P = .78). The repeatability was 0.8 % ± 0.4 % and 1.9 % ± 1.4 % , respectively. The reproducibility was 0.23 % . The reliability coefficient with AS-OCT was 99.6 % . The mean ACD measured with immersion US A-scan was 2.98 ± 0.33 mm by observer 1 and 2.95 ± 0.34 mm by observer 2 (P = .68) . The repeatability was 6.4 % ± 3.8 % by observer 1 and 8.5 % ± 4.9 % by observer 2. The reproducibility was 0.88 % . The reliability coefficient was 87.1 % for US A-scan measurements. The difference between ACD values with AS-OCT and values with US A-scan was statistically significant (P = .02). The correlation (r) between AS-OCT and US A-scan was 0.732 (P<.0001) by observer 1 and 0.802 (P<.0001) by observer 2.
Conclusions
Anterior chamber measurements were significantly deeper with AS-OCT than with US immersion A-scan. Repeatability of ACD measurements was better with AS-OCT than with immersion US, and reproducibility was equal with the 2 methods.