optical delusion

English

Noun

optical delusion (plural optical delusions)

  1. (dated) A vision or image that is deceptive or misleading, such as an optical illusion or a trick of the light.
    • 1887, H. Rider Haggard, She: A History of Adventure‎:
      I rubbed my eyes, thinking that I was the victim of some hallucination, or that the refraction from the intense light produced an optical delusion; and, as I did so, the flaming pillar slowly twisted and thundered off whithersoever it passes to in the bowels of the great earth, leaving Ayesha standing where it had been.
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