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BACKGROUND: Angle-closure glaucoma in children at the cicatricial stage of retinopathy of prematurity (ROP) has been thought to be caused by the anterior displacement of the lens-iris diaphragm resulting from contraction of a retrolental fibrous membrane. Other possible mechanisms include pupillary block and ciliary block. CASES: Three patients (three eyes) at the cicatricial stage of ROP with angle-closure glaucoma were examined by high-resolution ultrasonography before and after peripheral iridectomy. OBSERVATIONS: High-resolution ultrasonography preoperatively showed that the angle was closed. A retrolental fibrous membrane was attached behind the lens. After the iridectomy, ultrasonography showed an open angle, and the intraocular pressure was normal. CONCLUSIONS: The angle closure in our three patients was caused mainly by a pupillary block and could be treated by peripheral iridectomy.
Dr. A. Suzuki, Department of Ophthalmology, Nagoya University School of Medicine, Aichi, Japan. terasaki@med.nagoya-u.ac.jp
6.12 Ultrasonography and ultrasound biomicroscopy (Part of: 6 Clinical examination methods)
9.3.10 Other (Part of: 9 Clinical forms of glaucomas > 9.3 Primary angle closure glaucomas)