Angle Widening and Alteration of Ciliary Process Configuration after Cataract Surgery for Primary Angle Closure

To evaluate quantitatively, by means of ultrasound biomicroscopy (UBM), changes in the anterior segment configuration, including the ciliary processes, induced by cataract surgery in eyes with primary angle closure. Retrospective interventional case series. Thirty-one eyes of 31 patients with primary angle closure or primary angle-closure glaucoma were treated with cataract surgery. Before cataract surgery, 10 eyes had been treated with laser peripheral iridotomy, and 1 with laser peripheral iridoplasty. Configuration of the anterior chamber was examined by means of UBM before and at 3 months after cataract surgery. Using UBM, anterior chamber depth (ACD), angle opening distance at points 500 μm from the scleral spur (AOD500), and trabecular–ciliary process distance (TCPD) were measured. Not only ACD and AOD500, but also TCPD, increased significantly after cataract surgery, compared with measurements obtained before surgery ( P