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Ebbinghaus illusion
Ebbinghaus illusion The Ebbinghaus illusion is a visual size illusion in which the surrounding context changes how large a central object appears.
The Ebbinghaus illusion is a visual size illusion in which the surrounding context changes how large a central object appears. In this effect, a central circle can seem to change size in the opposite direction to changes in nearby surrounding circles, showing that perceived size is influenced by contextual visual cues.