Outcomes of Ultrasound Cyclo Plasty in Primary Angle Closure Glaucoma

Précis: Ultrasound cyclo plasty (UCP) can be useful in decreasing the intraocular pressure (IOP) and burden of antiglaucoma medications in eyes with primary angle closure glaucoma (PACG). Nevertheless, baselines IOP was an important determinant for failure. Purpose: To evaluate the intermediate-term outcomes of UCP in PACG. Methods: This retrospective cohort study included patients with PACG who underwent UCP. The main outcome measures were IOP, number of antiglaucoma medications, visual acuity, and presence of complications. The surgical outcomes of each eye were classified as a complete success, qualified success, or failure based on the main outcome measures. Cox regression analysis was performed to identify possible predictors for failure. Results: Sixty-two eyes of 56 patients were included in the study. The mean follow-up period was 28.81 months (±18.2). The IOP and number of antiglaucoma medications decreased from a mean of 23.03 (±6.4) mmHg and 3.42 (±0.9) to 15.57 (±6.4) mmHg and 2.04 (±1.3), respectively, in the 12th month and to 14.22 (±5.0) mmHg and 1.91 (±1.5) in the 24th month (P<0.01 for all). The cumulative probabilities of overall success were 72.6±5.7% and 54.8±6.3% at 12 and 24 months, respectively. A high baseline IOP was associated with a higher risk of failure (hazard ratio=1.10, P=0.03). The most common complications were cataract development or progression (30.6%), rebound or prolonged anterior chamber reaction (8.1%), hypotony with choroidal detachment (3.2%), and phthisis bulbi (3.2%). Conclusions: UCP offers reasonable 2-year IOP control and reduction of the antiglaucoma medication burden. However, counseling on possible postoperative complications is needed.