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Rat Model of Photochemically-Induced Posterior Ischemic Optic Neuropathy
14:54

Rat Model of Photochemically-Induced Posterior Ischemic Optic Neuropathy

Published on: November 29, 2015

Ischemic optic neuropathies.

Katie Luneau1, Nancy J Newman, Valérie Biousse

  • 1Departments of Ophthalmology, Emory University School of Medicine, Atlanta, Georgia.

The Neurologist
|November 15, 2008
PubMed
Summary
This summary is machine-generated.

Anterior ischemic optic neuropathy (AION) is a common cause of vision loss in those over 50. While prognosis is often poor, some patients improve, and evaluating vascular risk factors is crucial.

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Related Experiment Videos

Last Updated: Jun 28, 2026

Rat Model of Photochemically-Induced Posterior Ischemic Optic Neuropathy
14:54

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Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients
12:23

Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients

Published on: April 14, 2014

Area of Science:

  • Ophthalmology
  • Neurology

Background:

  • Anterior ischemic optic neuropathy (AION) is the most frequent cause of acute optic neuropathy in individuals over 50.
  • It can also affect younger patients, characterized by painless visual loss, a relative afferent pupillary defect, and optic disc edema.

Purpose of the Study:

  • To summarize the clinical presentation, prognosis, and management considerations for anterior ischemic optic neuropathy.
  • To emphasize the importance of differential diagnosis, particularly ruling out giant cell arteritis in older patients.

Main Methods:

  • Clinical diagnosis based on characteristic symptoms and signs.
  • Assessment of optic nerve morphology (crowded disc, small cup-to-disc ratio).
  • Evaluation for underlying vascular risk factors and consideration of coagulation workup in younger patients.

Main Results:

  • Visual prognosis is typically poor, with spontaneous improvement in up to 43% of cases.
  • Risk of fellow eye involvement is up to 15% within 5 years; recurrence in the same eye is less than 5%.
  • No specific treatment for acute nonarteritic AION, but management focuses on risk factor modification.

Conclusions:

  • Early identification and management of vascular risk factors are essential in nonarteritic AION.
  • Giant cell arteritis must be excluded in patients over 50 presenting with ischemic optic neuropathy.
  • Posterior ischemic neuropathy is rare and a diagnosis of exclusion.