U.S. National Library of Medicine
An illusion of vision usually affecting spatial relations.
The numerical value of optical illusions in Chaldean Numerology is: 5
The numerical value of optical illusions in Pythagorean Numerology is: 8
Images & Illustrations of optical illusions
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"optical illusions." Definitions.net. STANDS4 LLC, 2017. Web. 24 Nov. 2017. <http://www.definitions.net/definition/optical illusions>.