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Saccade

“A saccade (pronounced /səˈkɑːd/, sə-KAHD) is a fast movement of an eye, head or other part of an animal’s body or 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. Initiated by eye fields in the frontal and parietal lobes of the brain, saccades serve as a mechanism for fixation, rapid eye movement and the fast phase of optokinetic nystagmus.”

Wikipedia

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