Aphakic cystoid macular edema after branch artery occlusion.

Aphakic cystoid macular edema was demonstrated angiographically in both eyes of the patient, two months after bilateral cataract extraction. The right eye, which suffered a previous temporal branch artery occlusion, demonstrated a distinctive semicircular pattern of edema. No leakage of fluorescein occurred in the region below the horizontal raphe. The case illustrates that aphakic cystoid macular edema is caused by abnormalities in the retinal, rather than the choroidal, vasculature.