illusion

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illusion

(Deception), noun aberration, distortion, fallacy, false impression, misbelief, misconception

illusion

(Impression), noun apparition, artifice, chimera, daydream, deception, delusion, dream, figment, masquerade, mirage, myth, optical illusion, phantasm, phantasmagoria, phantom, semblance, specter, spirit, vision, wraith
See also: artifice, deception, distortion, fallacy, figment, phantom, prestidigitation, semblance, specter, vision

ILLUSION. A species of mania in which the sensibility of the nervous system is altered, excited, weakened or perverted. The patient is deceived by the false appearance of things, and his reason is not sufficiently active and powerful to correct the error, and this last particular is what distinguishes the sane from the insane. Illusions are not unfrequent in a state of health, but reason corrects the errors and dissipates them. A square tower seen from a distance may appear round, but on approaching it, the error is corrected. A distant mountain may be taken for a cloud, but as we approach, we discover the truth. To a person in the cabin of a vessel under sail, the shore appears to move; but reflection and a closer examination soon destroy this illusion. An insane individual is mistaken on the qualities, connexions, and causes of the impressions he actually receives, and he forms wrong judgments as to his internal and external sensations; and his reason does not correct the error. 1 Beck's Med. Jur. 538; Esquirol, Maladies Mentales, prem. partie, III., tome 1, p. 202. Dict. des Sciences Medicales, Hallucination, tome 20, p. 64. See Hallucination.

References in periodicals archive ?
As can be seen from the both historical and contemporary examples of ceramic art given above, the effects of optical illusion are used independently from each other in every creation.
For Emanuele Tesauro (1592-1675), the foremost theorist of the literary Baroque, anamorphosis and optical illusions are capable of "opening," that is, of expressing a view of life as unstable, uncertain, in which all knowledge is partial because of the relationship between an object and a viewer or speaker, whose conditions changes continuously; and yet, in his own words "omnis in unum," they could be used to "close" the circle by stressing their ability to compress and reduce a great number of different objects.
Give an example of an optical illusion that originates in the eye.
The collection of optical illusions is varied, making the reader wonder which arrow is longer?
When you look through the optical illusions on these pages, you won't believe your eyes.
Dark spots on the moon were accounted for as shading in a painting, or as an optical illusion from the light of sunlit clouds.
If you watch as it dips behind buildings or trees, an optical illusion is produced, which makes the moon seem even larger than it really is.
The outfit of the featured band member resembled the colors or design of the optical illusion in the background.
If you wear stripes of the same thickness or stripes leaning in the same direction, you will look like an optical illusion.
Scientists from the University of Queensland in Australia, with the help of computer models, have proved that the striped pattern creates an optical illusion when zebras move, the Independent reported.
ISLAMABAD -- Arthritic pain can be eased by an optical illusion relying on mirrors to trick the brain.
com Optical illusion Loving the blacK and white trend?