Definition of optical illusion in English:

optical illusion


  • 1Something that deceives the eye by appearing to be other than it is.

    • ‘The President of the British Astronomical Association, Edward Walter Maunder, argued that these ‘canals’ were optical illusions.’
    • ‘With no optical illusions and only ‘pure’ magic and no curtains, frame or stage, Pandey has managed to achieve the impossible.’
    • ‘Consider the famous optical illusion of two identical lines where one has concave triangles at its edges whilst the other has convex triangles at either end.’
    • ‘After they spot a UFO, Frank and Joe take cover in a house filled with strange optical illusions.’
    • ‘Artists working with the ‘rules of perspective’ have created optical illusions or visual contradictions.’
    • ‘Concerning that last factor, I once created an interesting set of optical illusions for a science center, a show that we called, ‘As Eye See It.’’
    • ‘It is not an optical illusion or trick photography.’
    • ‘Salvador Dali's Optical Illusion contains over 50 of the artist's most important paintings, so expect plenty of humour, shifting perspectives and, of course, optical illusions.’
    • ‘No evidence of canals were found and they were dismissed as optical illusions caused by the eye's tendency to join up noticeable landmarks with straight lines’
    • ‘But prisoners at Westlea police station have been surprised to find themselves gazing at vivid pop art and puzzling optical illusions.’
    • ‘Loosely reminiscent of the optical illusions of M. C. Escher, Paul Noble's Public Toilet was an uninhibited glorification of the banal.’
    • ‘The reason many thought it was magic was because the largest of the tattoos that covered its body, as well as the vast majority, were optical illusions, causing something of a hypnosis to occur with those who dared to stare long enough.’
    • ‘Not even Elizabeth could create such clever faces, like optical illusions that changed when you blinked.’
    • ‘Her black and white geometrical designs appealed to a young child in short trousers, looking much more like optical illusions than traditional paintings.’
    • ‘Unfortunately, the canals turned out to be optical illusions.’
    1. 1.1An experience of seeming to see something that does not exist or that is other than it appears.
      • ‘Jerry's the one who specializes in optical illusions, and will be one of our featured speakers at The Amaz!’
      • ‘This results in an optical illusion known as a mirage.’
      • ‘For instance, a very nice test of a robotic vision system would be to see whether it was susceptible to the same optical illusions that we are.’
      • ‘This optical illusion is known as the ‘Moon Illusion.’’
      • ‘It seems possible that optical illusions may have had a role to play in the coining of several common proverbs regarding the use of vision as the sole source of information.’
      • ‘I was looking at a website about optical illusions, and they had a great example of how natural rock formations can look like a face.’
      • ‘Everyone, from young children to my 94 year-old grandmother, is fascinated by optical illusions.’
      • ‘An optical illusion is not a party trick - the mechanism behind it is central to how we perceive the world.’
      • ‘The optical illusions created by the cape intensified Johnson's keen sense of space and body, and she demonstrated a fluid dexterity with her seemingly unhinged fingers and legs.’
      • ‘Why did the Peales, together with so many of their contemporaries, find optical illusions so enticing?’
      • ‘He said they are analogous to optical illusions.’
      • ‘Its black, still waters gleam like an endless mirror, creating kaleidoscopic shades of green and endless optical illusions.’
      • ‘As a kid, I used to see optical illusions that were caused by the heat on the prairie in North Dakota.’
      • ‘Proper use of the diagonal line can cover a lot of figure flaws by creating exciting optical illusions.’
      • ‘Following are some examples of optical illusions that can occur with various types of sewing patterns and fabrics.’
      • ‘Another optical illusion that causes umpires to make mistakes is the parallax error.’
      • ‘The reason for this focus seems clear enough: from the standpoint of basic research, errors tell us a great deal about fundamental cognitive processes, just as optical illusions teach us about the functioning of the visual system.’
      • ‘Matt will perform in the Magic Factory, a new venue at Oakwood which not only stages his shows, but also provides fantastic optical illusions.’
      • ‘Recognising the fluidity and occasional capriciousness of perception, Leonardo delighted in it, contriving not only rebuses or visual puns, but also optical illusions.’
      • ‘The design's angular configuration makes it possible for two people to face the piece and create an optical illusion - each person's head appears on the other's body.’
      • ‘Like an early Bridget Riley painting summoned to life, Universal generates more and more perplexing optical illusions the longer one watches it.’
      illusion, optical illusion, deception, figment of the imagination
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optical illusion

/ˈäptəkəl iˈlo͞oZHən/