Chronostasis (from Greek χρόνος, chrónos, “time” and στάσις “standing”) is the illusion in which the first impression following a saccade (fast eye movement) seems to be extended in time. The most nicely-recognized version of this illusion is the stopped-clock illusion, exactly where the first movement of the second hand of an analog clock, following the viewer’s directing focus to the clock, seems to take longer than the next movement.
When eyes execute a saccade, perception of time stretches slightly backward. The viewer’s brain registers that they have been searching at the clock for slightly longer than they actually have, creating the illusion that the second-hand is frozen for much more than a second. Despite the fact that this happens every time the eyes move from one particular fixation point to the subsequent, it is seldom noticed. 1 explanation is that the brain is filling in the gap while the eyes move from searching at 1 issue to the subsequent. [Source]
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