• Why Do Eyes Roll Back Into Head During Knockout?


    Question:

    When a boxer gets knocked out in a fight, why do the pupils always roll to the back of their head?


    Answer:

    What you are describing is the rolling up of the eyes related to loss of consciousness which is called "Bell's phenomenon.” It is thought to be a protective reflex. Since vision is lost when consciousness is lost, a rolling up of the eyes moves the more sensitive parts under the protection of the upper lid so the eye will maintain its health and vision when consciousness returns.


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