Safety and efficacy of 8- and 10-sector ultrasound cyclocoagulation: a retrospective study

Abstract Purpose: To measure the efficacy and safety of ultrasound cycloplasty (UCP) in sectors 8 and 10.Methods: Thirty-four patients with various types and degrees of glaucoma (43 eyes) underwent UCP at the Aier Eye Hospital of Tianjin University. Primary outcomes included intraocular pressure and visual acuity. Secondary outcomes included corneal endothelium, pupil area, cornea (Surface asymmetry index）SAI and(Surface regularity index) SRI , ciliary body detachment, and the safety and efficacy of UCP after trabeculectomy.Results: Twelve months postoperatively, intraocular pressure (IOP) decreased from 28.4 mmHg to 14.4 mmHg (P < 0.05). On average, IOP decreased by 44.7%, and the success rate was 55.8%. At the final follow-up, IOP decreased by 43.46% on average, and the success rate was 62.8%. There was a significant difference in the postoperative pupil area of the eight sectors (P = 0.016) within six months and no significant difference after six months. There was a significant difference in SRI between baseline and one month after UCP (P = 0.016) and no significant difference in the remaining months. There was no significant difference in corneal endothelium from the preoperative baseline. Ciliary body detachment occurred in sectors 8 and 10, and it was removed and reduced one month after surgery. The success rate of UCP after trabeculectomy was 91%, and there were no follicle-related complications.Conclusion: UCP is safe and significantly lowers IOP, with few short-term complications and no long-term complications. It is safe and effective to select sectors 10 and 8 for IOP reduction; however, there is no advantage in IOP reduction compared with sector 6.