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K. Takahashi, K. Kawana, T. Oshika; Anterior Chamber Angle Assessment Using Anterior Segment Optical Coherence Tomography, Ultrasound Biomicroscopy and Rotating Scheimpflug Camera. Invest. Ophthalmol. Vis. Sci. 2007;48(13):872.
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© ARVO (1962-2015); The Authors (2016-present)
We compared 1.3 µm light source anterior segment optical coherence tomography (OCT), ultrasound biomicroscopy (UBM) and rotating Scheimpflug camera in the evaluation of anterior chamber angle and anterior chamber depth (ACD) in eyes with normal open angle.
Twenty eight eyes of fourteen normal subjects were enrolled. (27.9 ± 5.26 years old, 10 men and 4 females). All subjects were examined with slit lamp gonioscopy, anterior segment OCT (Visante, Carl Zeiss Meditec, Dublin, CA), UBM (UX-02, Rion, Tokyo, Japan) and rotating Scheimpflug camera (Pentacam, Oculus, Wetzlar, Germany). Nasal and temporal anterior chamber angle, AOD 500 and ACD measured by Visante and UBM were analyzed. The anterior chamber angle at nasal and temporal side and ACD were assessed by Pentacam. AOD 500 was defined as the distance from the point 500 µm anterior to the scleral spur to the iris plane. The anterior chamber angle was calculated by connecting these two points and the angle recess.
Gonioscopy showed that all eyes had anterior chamber angle of Shaffer grade 3 or wider. The nasal anterior chamber angle was 45.7°, 43.4° and 44.6°, by Visante, UBM and Pentacam, respectively. The temporal angle was 47.6°, 45.3° and 48.1°, respectively. There were no significant differences in each measurement (nasal; p = 0.207, temporal; p = 0.118; ANOVA ). ACD was 3.37 mm, 3.28 mm and 3.36 mm, by Visante, UBM and Pentacam, respectively. Similarly, there was no significant difference in measurement results (p = 0.195; ANOVA). Nasal AOD 500 was 0.62 mm and 0.62 mm, by Visante and UBM, respectively. Temporal AOD 500 was 0.66 mm and 0.68 mm. There were no significant differences between Visante and UBM measurements (nasal AOD 500; p = 0.47, temporal AOD 500; p = 0.30, unpaired t-test).
In eyes with wide open anterior chamber angle, the anterior chamber angles and ACD measured by Visante OCT were equivalent to those of UBM and Pentacam.
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