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E. Tomoyose, R. S. Kumar, I. Henzan, S. Sawaguchi, T. Aung, H. Sakai; Comparison of Uveal Effusion in Primary Angle Closure Eyes Diagnosed by Anterior Segment Optical Coherence Tomography and Ultrasound Biomicroscope. Invest. Ophthalmol. Vis. Sci. 2009;50(13):2462.
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To evaluate the imaging ability for sub-clinical uveal effusion in primary angle closure eyes by anterior segment OCT (AS-OCT) and to compare it with ultrasound biomicroscope (UBM).
23 consecutive eyes with acute or chronic primary angle closure (PAC), PAC suspect (PACS), or with glaucoma (PACG) and demonstrating uveal effusion on AS-OCT or UBM were summarized. The images were evaluated and graded by masked observers. Uveal effusion was diagnosed when the suprachoroidal space was visualized as a separation between the sclera and pars plana of the ciliary body. Uveal effusion was graded as 0 (none), 1 (slit), 2 (band), and 3 (severe) as previously reported.
In 4 eyes of 4 patients with acute PAC, 3 eyes had grade 2 and 1 eye had grade 1 uveal effusion. All 4 eyes had effusion circumferentially and were identified by both UBM and AS-OCT. Grade 1 uveal effusion was diagnosed by AS-OCT in 19 chronic PAC eyes, and 14 eyes out of these 19 eyes showed effusion on UBM; none of the effusions were seen on UBM alone. Using AS-OCT, effusion was evident in 4 quadrants (3 eyes), 3 quadrants (7 eyes), 2 quadrants (5 eyes), and 1 quadrant (4 eyes). UBM showed effusion in 3 quadrants (5 eyes), 2 quadrants (2 eyes) and 1quadrant (7 eyes). Using UBM none of the eyes demonstrated effusion in all 4 quadrants and effusion was not found in 5 eyes (P=0.015, chi-square test, William's correction).
AS-OCT seems to have greater ability compared to UBM to demonstrate sub-clinical uveal effusion, such as that present in eyes with chronic PAC.
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