Impossible figure based on a staircase in the form of a continuous loop that seems to rise endlessly.
Visual representation of a triangular frame that could not exist in three-dimensional space.
Perceptual illusion demonstrating that the visual system uses context as well as physical luminance to determine the lightness or darkness of an object.
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.
Optical toy producing the illusion of moving images, popular during the Victorian era.
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.
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| Penrose staircase | |
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| Impossible figure based on a staircase in the form of a continuous loop that seems to rise endlessly. (Image included) |
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