In order to evaluate the morphologic types of appositional angle-closure glaucoma, biometric measurements were made in angle-closure glaucoma patients using Ultrasound biomicroscopy (UBM). Twenty-six patients with primary angle-closure glaucoma and 21 cataract patients with as a control group were examined. The angle-closure glaucomatous eyes were classified as type B in which the angle closure started at the bottom of the angle and type S in which the angle closure occurred in the vicinity of Schwalbe’s line. The trabecular-ciliary process distance (TCPD, type B; 873.20±86.77 μm, type S; 832.52±82.96 μm, control; 1233.50±73.01 μm, p = 0.000) and the angle opening distance (AOD500, type B; 89.75±63.27 μm, type S; 88.85±72.95 μm, control; 304.40±104.30 μm, p = 0.000) were significantly shorter in patients with angle closure vice control group. No significant difference were noted in the three groups of patients in regards to iris thickness or ciliary process-iris angle. In this study, we have demonstrated that there are two types of appositional angle-closure and have shown the forward rotation of the ciliary process without changes of the ciliary process-iris angle in cases of angle-closure glaucoma.
MATERIALS AND METHODS