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Under dim lighting, staring continuously at one's reflection can produce surprisingly strange visual distortions. Some people report facial features appearing altered or unfamiliar.
Researchers have studied this as the strange-face-in-the-mirror illusion. Visual adaptation and the brain's interpretation of poorly defined information may contribute to the effect. The face isn't actually changing—the visual system is. Sometimes, staring longer can make something familiar look less familiar.
© Perception