Arteritic anterior ischemic optic neuropathy (AAION) is a condition that occurs when blood flow to the optic nerve is reduced due to inflammation of the blood vessels, often associated with giant cell arteritis. This condition typically affects older adults and can lead to sudden vision loss in one eye. Symptoms of AAION may include blurred vision, a darkened area in the visual field, or complete vision loss. Prompt diagnosis and treatment are crucial to prevent further vision loss, as the condition can progress to affect the other eye if not addressed quickly.