Cystoid Macular Edema Cystoid macular edema (CME), or swelling of the macula, typically occurs as a result of disease, injury or more rarely, eye surgery. Fluid collects within the layers of the macula, causing blurred, distorted central vision. CME rarely causes a permanent loss of vision, but the recovery is often a slow, gradual process. The majority of patients recover in 2 to 15 months. In this retinal photograph, the swelling is the yellowish spots (arrow) in the macula. SIGNS AND SYMPTOMS •Blurred central vision •Distorted vision (straight lines may appear wavy) •Vision is tinted pink •Light sensitivity DETECTION AND DIAGNOSIS It is very difficult to detect CME during a routine examination. A diagnosis is often based on the symptoms of the patient and a particular dye test called a fluorescein angiogram (FA). TREATMENT The first line of treatment for CME is usually anti-inflammatory drops. In certain cases, medication is injected near the back of the eye for a more concentrated effect. Oral medications are sometimes prescribed to reduce the swelling.