Recidiva de necrose aguda de retina por citomegalovírus

Acute retinal necrosis (ARN) is a rare form of uveitis caused by a viral infection. It manifests as necrotizing retinitis and can result in serious vision loss if not correctly diagnosed and treated. This article reports the case of a patient with a history of previous treatment for ARN, which was completed 3 months ago, who had a relapse in spite of being immunocompetent. The relapse was confirmed and documented by measuring IgM levels in the aqueous humor as blood serology only showed positive IgG. The ophthalmic findings, clinical evolution, treatment (including prophylaxis), and follow-up are described.