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Y. Arakaki, I. Medoruma, H. Sakai, S. Sawaguchi, A. Iwase, A. Tomidokoro, M. Araie, K. Kashiwagi; Evaluation of Anterior Chamber Configuration by Ultrasound Biomicroscopy and Scanning Peripheral Anterior Depth Analyzer in a Population of South-Westrn Island of Japan -Kumejima-. Invest. Ophthalmol. Vis. Sci. 2010;51(13):5535.
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© ARVO (1962-2015); The Authors (2016-present)
To compare the chamber angle findings obtained by ultrasound biomicroscopy (UBM) and scanning peripheral anterior chamber depth analyzer (SPAC) in a population of Kumejima, south-western island of Japan.
The study was performed as part of a population-based ophthalmological survey in all residents of Kumejima aged 40 years or older. Of the 4632 eligible subjects, SPAC was performed in all participants and UBM in the right eye of randomly chosen 10% subjects. Excluded were eyes with previous ocular surgery, ocular trauma, and ocular disorders making SPAC or UBM measurements unreliable. UBM parameters analyzed were AOD250, 500 and TIA in dark and room light condition. The SPAC parameters analyzed were central anterior chamber depth (CACD), peripheral anterior chamber depth (PACD), and angle opening analyzed at all points (All-P) and at peripheral 3 points (3-P).
UBM and SPAC images were obtained in 300 right eyes (55.5+/-2.1 years old, 151 male and 149 female). CACD, PACD and angle opening were correlated with the UBM parameters (|r|=0.2~0.6, P<0.01), and better correlation was obtained in room light condition. Angle opening of All-P (23.3+/-1.84 degree) and 3-P (17.25+/-7.28 degree) by SPAC were wider than TIA by UBM in dark (13.08+/-0.52degree) and room light condition (15.64+/-0.80 degree), respectively (P<0.01).
Weak to moderate, but significant correlation between SPAC and UBM measurements were seen. SPAC overestimated the angle width compared with UBM.
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