Saccade

"Remember, the first scientist to experiment with change blindness was making changes to the page while people were looking directly at it. He was able to do it by introducing the changes during saccadic movement."
["5 Ways Your Brain Is Messing With Your Head" by Brian Walton, Cracked.com*]

NOUN: A rapid intermittent eye movement, as that which occurs when the eyes fix on one point after another in the visual field.
ETYMOLOGY: French, twitch, from Old French, from Old North French saqiuer, to pull, from sac, sack. See sac.
ADJECTIVE: sac·cadic
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