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An Ocular Chameleon.

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Transient visual loss requires careful evaluation to distinguish monocular from binocular causes. Ocular ischemic syndrome, linked to carotid artery stenosis, is a key differential diagnosis in older patients with vascular risk factors.

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Area of Science:

  • Ophthalmology
  • Neurology
  • Vascular Medicine

Background:

  • Transient visual loss is a common emergency department presentation requiring differentiation between monocular and binocular etiologies.
  • Ocular ischemic syndrome (OIS) is a significant cause of monocular visual loss, particularly in elderly patients with vascular risk factors.

Observation:

  • This case highlights monocular visual loss affecting one eye predominantly, with independent, less frequent involvement of the other eye.
  • Meticulous history and comprehensive examinations (general, neurological, ophthalmological) are crucial for diagnosing the cause.

Findings:

  • Ocular ischemic syndrome (OIS) results from chronic hypoperfusion of ophthalmic artery territories, often due to ipsilateral internal carotid artery stenosis.
  • OIS presents as monocular visual loss and necessitates consideration in patients with vascular risk factors.

Implications:

  • Accurate diagnosis and timely management of OIS are vital to prevent further visual deterioration and systemic complications.
  • A multidisciplinary approach involving neurologists, ophthalmologists, and emergency physicians optimizes patient care for OIS.