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Light-induced amaurosis fugax.

K Kaiboriboon¹, P Piriyawat, J B Selhorst

¹Department of Neurology, Saint Louis University, St. Louis, Missouri, USA. kaibork@slu.edu

American Journal of Ophthalmology

|May 5, 2001

Summary

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Transient light-induced vision loss can signal severe carotid artery disease. Prompt diagnosis and surgical intervention are crucial to prevent stroke.

Area of Science:

Ophthalmology
Neurology
Vascular Surgery

Background:

Ocular ischemic syndrome (OIS) is a severe condition resulting from reduced blood flow to the eye.
Carotid artery disease is a primary cause of OIS, often presenting with diverse and sometimes subtle symptoms.

Observation:

A case report detailing a 54-year-old male experiencing transient, painless, and asymmetrical visual loss triggered by bright light exposure.
This symptom, termed bilateral amaurosis, was investigated through carotid ultrasound and angiography.

Findings:

Diagnostic imaging revealed significant bilateral carotid artery disease, including left internal carotid artery occlusion and severe stenosis in the right internal carotid artery and both external carotid arteries.
The patient's visual disturbances and abnormal photostress test results resolved completely following a right carotid endarterectomy.

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Implications:

Light-induced amaurosis is an underrecognized manifestation of OIS linked to substantial carotid occlusive disease.
Early identification of this symptom is critical for initiating timely surgical intervention and mitigating the significant risk of stroke.