Obraz kliniczny tylnej niedokrwiennej neuropatii nerwu wzrokowego
Clinical Spectrum of the Posterior Ischemic Optic Neuropathy
Iwona Obuchowska, Zofia Mariak
Klinika Okulistyki Akademii Medycznej w Białymstoku Kierownik: dr hab. n. med. Zofia Mariak
Summary: Posterior ischemic optic neuropathy (PION) is a rare condition that follows infarction of the posterior portion of the optic nerve. This disorder can be divided into three distinct subtypes based on the clinical scenario and associated conditions. The most frequent type - nonarteritic PION, has been described in association with a variety of conditions including atherosclerosis, arterial hypertension, diabetes and nocturnal hypotension. Arteritic PION can occur with a systemic vasculitis, most commonly giant cell arteritis. Perioperative type of PION occurs in the setting of profound hypotension and severe anemia during the perioperative period. Clinical features of posterior ischemic optic neuropathy include sudden visual loss, variable visual field defects, relative afferent papillary defect and normal optic disc. Diagnosis of PION can be made only after other causes of the optic neuropathy have been excluded.