Non-Arteritic Anterior Ischemic Optic Neuropathy

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Non-arteritic anterior ischemic optic neuropathy, right eye.

a) Acute phase showing hyperemia, superior optic nerve edema with telangiectatic vessels, and nasal nerve fiber layer (flame/splinter) hemorrhage.

b) Late phase showing segmental pallor superiorly. Note the healthy optic nerve tissue inferiorly and the preservation of the crowded cup-to-disc ratio.

Image credit: American Academy of Ophthalmology. Used with permission for educational purposes.