Urrets-Zavalia syndrome after implantable collamer lens implantation

Abstract

Urrets-Zavalia syndrome (UZS), characterized by iris atrophy and a fixed, dilated pupil, is a rare postoperative complication that can occur after ocular surgery. We outline the case of a 19-year-old male patient in good health who was treated with an implantable collamer lens for extreme myopia and astigmatism in both eyes. During surgery, the patient’s left eye had a fixed, mid-dilated pupil, and on the first postoperative day, his intraocular pressure (IOP) was elevated. With medical intervention, the high IOP was reduced within three days. Pilocarpine (2%) eye drops proved ineffective to constrict the pupil in the left eye. Up to one year of follow-up period, the pupil remained at a mid-dilated state and was unresponsive to both light and accommodative stimuli, and the best corrected vision was 6/9 in the right eye and 6/18 in the left eye. The patient has been diagnosed with UZS.