Light-induced amaurosis fugax.
OBJECTIVE
To describe an important symptom of bilateral amaurosis precipitated by exposure to bright light.


METHODS
Case report. Clinical analysis of transient, painless, asymmetrical visual loss occurring in bright light in a 54-year-old man.


RESULTS
Carotid ultrasound showed bilateral carotid disease. Carotid angiography demonstrated occlusion of the left internal carotid artery and severe stenosis of the right internal carotid artery and both external carotid arteries. Visual symptoms and an abnormal photostress test completely remitted after a right carotid endarterectomy.


CONCLUSIONS
Light-induced amaurosis is an unfamiliar manifestation of ocular ischemic syndrome occurring with severe, often bilateral, carotid artery disease. Its recognition is important because the complaint is associated with severe carotid occlusive disease and recognition is necessary for timely surgical intervention because of the major risk for stroke.
Kaiboriboon
K
K
Department of Neurology, Saint Louis University, St. Louis, Missouri, USA. kaibork@slu.edu
Piriyawat
P
P
Selhorst
J B
JB
D020757:Amaurosis Fugax / Q000209:etiology*; D000792:Angiography; D002342:Carotid Artery, External / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D016893:Carotid Stenosis / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D016894:Endarterectomy, Carotid; D006801:Humans; D008027:Light / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D014792:Visual Acuity