Non-arteritic anterior ischemic optic neuropathy

Last revised by Dr Yahya Baba on 26 Apr 2022

Non-arteritic anterior ischemic optic neuropathy (NAION) is a form of ischemic optic neuropathy.

Epidemiology

It is considered the most common acute optic neuropathy in patients over 50 years of age (especially in those with vasculopathy risk factors (e.g. diabetes mellitus, hypertension, and obstructive sleep apnea).

Pathology

The condition is thought to be caused by infarction of the laminar or retrolaminar portions of the optic nerve head supplied by the short posterior ciliary arteries (SPCAs).

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