Title: Blackout | definition of blackout by Medical dictionary
Headings: blackout
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Content: 3. Temporary loss of vision, without alteration of consciousness, due to positive (above normal) g (gravity) forces; caused by temporary decreased bloodlow in the central retinal artery, and seenmostly in aviators. 4. A transient episode that occurs during a state of intense intoxication (alcoholic blackout) for which the person has no recall, although not unconscious (as observed by others). Medical Dictionary for the Health Professions and Nursing © Farlex 2012
blackout
A common term for a temporary loss of vision or consciousness. This may be a harmless fainting attack or a brief period of visual loss caused by standing up suddenly. Both are due to transient shortage of blood to the brain (cerebral ischaemia). Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
blackout
Synonym for amaurosis fugax. It also includes the temporary loss of vision and consciousness occurring in unprotected pilots, due to a reduction of blood supply to the eye and brain at high acceleration.