amaurosis fugax

(redirected from visual blackout)

amaurosis

 [am″aw-ro´sis]
loss of sight without apparent lesion of the eye, as from disease of the optic nerve, spine, or brain.
amaurosis conge´nita (amaurosis congenita of Leber) (congenital amaurosis) hereditary blindness occurring at or shortly after birth, associated with an atypical form of diffuse pigmentation and commonly with optic atrophy and attenuation of the retinal vessels.
amaurosis fu´gax sudden temporary or fleeting blindness.
Leber's congenital amaurosis amaurosis congenita.

am·au·ro·sis fu·'gax

a transient blindness that may result from a transient ischemia resulting from carotid artery insufficiency or retinal artery embolus, or to centrifugal force (visual blackout in flight).

amaurosis fugax

[fo̅o̅′gaks]
a transient episodic blindness caused by decreased blood flow to the retina. Compare amaurosis.

amaurosis fugax

Transient retinal ischemia, see there.

am·au·ro·sis fu·gax

(am'aw-rō'sis fū'gaks)
Transient blindness that may result from carotid artery insufficiency, retinal artery embolus, or centrifugal force (visual blackout in flight).

amaurosis fugax

Transient loss of vision, usually for a few seconds or minutes caused by interference to the blood supply to parts of the brain or eye by tiny EMBOLI or by spasm of the arteries supplying the eye. Repeated attacks can damage the RETINA and the condition is a warning of the grave danger of STROKE. Amaurosis fugax is a form of TRANSIENT ISCHAEMIC ATTACK.

amaurosis fugax 

Transient unilateral loss of vision. The visual loss varies from partial to total blindness and rarely lasts longer than 10 minutes. It is usually caused by a temporary occlusion in the internal carotid artery, which produces an insufficient blood flow to the ophthalmic artery and may lead to closure of the central retinal artery. Syn. blackout. See fluorescein angiography; temporal arteritis; blackout; bruit; Hollenhorst's plaques; retinal arterial occlusion.
References in periodicals archive ?
The problem is a sort of a textual overload or visual blackout.
The visual blackout which the fourteen-year-old boy experienced during the war is paralleled by a muffling of sounds, by sounds and words which he is not allowed to hear, such as the signal of BBC radio from an adjoining room or the faint human voices emanating from a cattle car, begging for water.