Glance at a clock right after moving your eyes, and the first second can seem to drag

Chronostasis, also called the stopped-clock illusion, makes the first moment you fixate on something after a quick eye movement feel stretched out, by up to half a second longer than it really lasted. Researchers believe the brain backfills the blank gap during the eye movement with the image you land on, inflating how long that first glance seems to have been seen. It's why a second hand can briefly appear frozen the instant you look at a clock.

— Kielan Yarrow, Patrick Haggard, Rachel Heal, Paul Brown, John C. Rothwell, Illusory perceptions of space and time preserve cross-saccadic perceptual continuity — Nature, 2001

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