Ocular abnormalities in patients with AIDS were first reported in 1982. The most common finding is a non-infectious "HIV retinopathy", characterized by cotton wool spots, intraretinal hemorrhages, and/or microaneurysms. These changes occur in approximately 50 percent of patients with AIDS. HIV retinopathy alone is not typically associated with clinical loss of vision, but functional deficits in patients with AIDS without other ocular complications may be due to this phenomenon.