Perceptual illusion in which an artificial blind spot is filled in by a twinkling background.
Perceptual illusion in which an image in peripheral vision disappears.
Redirected to phenakistiscope.
Redirected to phenakistoscope.
Optical toy producing the illusion of moving images, popular during the Victorian era.
Redirected to Brocken spectre.
Optical illusion in which the apparently greatly magnified shadow of an observer, when projected onto a surrounding mist, interferes with the observer’s depth perception.
Redirected to orgone.
Widely discredited theory of universal life energy developed by the Austrian psychiatrist Wilhelm Reich (1897–1957).