Fig. 10. UBM features of special glaucoma cases. A. Pigment dispersion syndrome with posterior bowing of peripheral iris (“q” configuration by Spaeth gonioscopic grading system). B. Plateau iris syndrome with origin of iris from anterior surface of ciliary processes behind peripheral iris, slitlike narrowing of peripheral angle, and abrupt transition from steep peripheral iris to flat iris midzone. C. Broad peripheral anterior synechia with posterior bowing of nonadherent iris. D. Peripheral anterior synechia with aqueous-filled slit between site of iridocorneal adhesion and iris root after cataract extraction with implantation of posterior-chamber IOL.