Title: Amaurosis fugax - Wikipedia
Headings: Amaurosis fugax
Amaurosis fugax
Contents
Signs and symptoms
Cause
Embolic and hemodynamic origin
Ocular origin
Ocular causes include:
Neurologic origin
Diagnosis
Treatment
See also
References
External links

Content: The consequent reduction in perfusion pressure renders the small, low-pressure vessels that supply the optic nerve head vulnerable to compromise. Brief fluctuations in intracranial or systemic blood pressure may then result in transient loss of function in the eyes." Generally, this transient visual loss is also associated with a headache and optic disk swelling. Multiple sclerosis can cause amaurosis fugax due to a unilateral conduction block, which is a result of demyelination and inflammation of the optic nerve, and "...possibly by defects in synaptic transmission and putative circulating blocking factors." Migraine ( auras often involve temporary scotomas, and a spectrum up to transient full vision loss exists)
Idiopathic Intracranial Hypertension
Intracranial tumor
Psychogenic
Diagnosis
Despite the temporary nature of the vision loss, those experiencing amaurosis fugax are usually advised to consult a physician immediately as it is a symptom that may herald serious vascular events, including stroke. Restated, “because of the brief interval between the transient event and a stroke or blindness from temporal arteritis, the workup for transient monocular blindness should be undertaken without delay.” If the patient has no history of giant cell arteritis, the probability of vision preservation is high; however, the chance of a stroke reaches that for a hemispheric TIA. Therefore, investigation of cardiac disease is justified. A diagnostic evaluation should begin with the patient's history, followed by a physical exam, with particular importance being paid to the ophthalmic examination with regards to signs of ocular ischemia.