Wikipedia about Saccade

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• • Christian

    ISFJ
    Published: 06-22-2014 05:24 am
  • http://en.wikipedia.org/wiki/Saccade
    
    "A saccade (/sɨˈkɑːd/ sə-KAHD) is a fast movement of an eye, head or other part of the body or of a device. It can also be a fast shift in frequency of an emitted signal or other quick change. Saccades are quick, simultaneous movements of both eyes in the same direction.[1] Initiated cortically by the frontal eye fields (FEF), or subcortically by the superior colliculus, saccades serve as a mechanism for fixation, rapid eye movement, and the fast phase of optokinetic nystagmus.[1] The word appears to have been coined in the 1880s by French ophthalmologist Émile Javal, who used a mirror on one side of a page to observe eye movement in silent reading, and found that it involves a succession of discontinuous individual movements.[2]"

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