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: Ocular origin
Ocular causes include: Iritis
Keratitis
Blepharitis
Optic disc drusen
Posterior vitreous detachment
Closed-angle glaucoma
Transient elevation of intraocular pressure
Intraocular hemorrhage
Coloboma
Myopia
Orbital hemangioma
Orbital osteoma
Keratoconjunctivitis sicca testing
Neurologic origin
Neurological causes include: Optic neuritis
Compressive optic neuropathies
Papilledema: " The underlying mechanism for visual obscurations in all of these patients appear to be transient ischemia of the optic nerve head consequent to increased tissue pressure. Axonal swelling, intraneural masses, and increased influx of interstitial fluid may all contribute to increases in tissue pressure in the optic nerve head. 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.