optical illusion

Noun
  1. An optical phenomenon that results in a false or deceptive visual impression (synset 111510863)
    is a type of: optical phenomenon - a physical phenomenon related to or involving light
    subtypes:
    • apparent motion, apparent movement, motion, movement - an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object
    • mirage - an optical illusion in which atmospheric refraction by a layer of hot air distorts or inverts reflections of distant objects

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