Amaurosis_fugax Amaurosis_fugax

Amaurosis fugax - Definition and Overview

Amaurosis fugax is a type of transient ischaemic attack (TIA). It is caused by ischemia (decreased blood flow) to the retina, usually by an embolus (detached blood clot) entering the ophthalmic artery.

The experience of amaurosis fugax is described as a "curtain coming down vertically into the field of vision in one eye". Complete blackness (vision loss) in that eye lasts between 5 and 30 minutes.

The most common cause of amaurosis fugax is emboli (blood clots) coming off a stenosed carotid artery. Other causes include emboli from the heart or heart valves and arterial spasm.

Even though blindness is temporary, this is a serious symptom because it indicates the danger of further vascular events occurring, including stroke. Anyone with amaurosis fugax should be reviewed by a doctor with some urgency.


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