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[Acute anterior, ischemic optic neuropathy].

C Vignal-Clermont1

  • 1Service d'ophtalmologie Hôpital Delafontaine 93205 Saint-Denis. cvignal@club-internet.fr

La Revue Du Praticien
|February 7, 2002
PubMed
Summary

Ischemic optic neuropathy (ION) is a common cause of vision loss in older adults. Differentiating between arteritic and nonarteritic ION is crucial for timely treatment and preserving sight.

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Area of Science:

  • Ophthalmology
  • Neurology
  • Vascular Medicine

Context:

  • Ischemic optic neuropathy (ION) is the most frequent optic neuropathy in individuals over 50.
  • Anterior ION presents as either nonarteritic (NAION) or arteritic (AION).
  • NAION is often associated with vasculopathic risk factors or a small optic disc.

Purpose:

  • To differentiate between nonarteritic and arteritic ION.
  • To highlight diagnostic tools and clinical findings.
  • To discuss treatment implications for both forms of ION.

Summary:

  • Sudden monocular visual loss and optic nerve swelling with altitudinal visual field defects are typical exam findings.
  • Clinical profile, sedimentation rate, and fluorescein angiography are key in distinguishing NAION from AION.
  • While arteritic ION (associated with temporal arteritis) requires emergency steroid treatment, effective therapies for NAION are lacking.

Impact:

  • Accurate diagnosis of ION subtypes is critical for appropriate patient management.
  • Understanding the distinct etiologies of NAION and AION guides therapeutic strategies.
  • This distinction impacts the urgency and type of treatment, influencing visual outcomes.

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