#optical_illusion__opticalillusion  an optical phenomenon that results in a false or deceptive visual impression
  supertype:  optical_phenomenon__opticalphenomenon  a physical phenomenon related to or involving light
  subtype:  apparent_motion__motion__apparent_movement__movement  an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object; "the cinema relies on apparent motion"; "the succession of flashing lights gave an illusion of movement"
  subtype:  mirage.optical_illusion  an optical illusion in which atmospheric refraction by a layer of hot air distorts or inverts reflections of distant objects
     subtype:  fata_morgana  a mirage in the Strait of Messina (attributed to the Arthurian sorcerer Morgan le Fay)

No statement uses or specializes optical_illusion; click here to add one.