Laser Peripheral Iridotomy in Primary Angle-Closure Suspects: Biometric and Gonioscopic Outcomes. The Liwan Eye Study

Abstract

Purpose: To assess the immediate effect of laser peripheral iridotomy (LPI) and mechanisms of angle closure in a population-based study of primary angle closure (PAC) suspects. Design: Prospective interventional study. Participants: People identified as PAC suspects aged 50 to 79 years from a population-based survey in Guangzhou, China. Intervention: Laser peripheral iridotomy was performed in 1 randomly selected eye. Examinations were carried out before and 2 weeks after the intervention. Main Outcome Measures: Intraocular pressure (IOP), ultrasound biometry, optical pachymetry, and gonioscopy. Results: A total of 72 people with bilateral suspected PAC participated in the study. Mean IOP de..