optical illusion

optical illusion

An optical illusion (also called a visual illusion) is an erroneous perception of reality in that the visually perceived images differ from the real world object. The information observed by the eye is processed in the brain in such a way that it causes a viewer to misunderstand or misinterpret what he or she actually sees.

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Part of Speech: noun
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Industry/Domain: Eyewear
Category: Optometry
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Related terms

optical

Broadcasting & receiving; Radio & TV broadcasting equipment

Generically, any on-screen graphic. Specifically, a graphic inserted between a programme and an advertisement or between individual advertisements.

optical

Health care; General

Having to do with vision.

illusion

Art history; Visual arts

Something that appears to be what it is not, and often intended so to deceive.

ophthalmoscope

Eyewear; Optometry

An optical instrument used to examine the external and internal parts of the eye, particularly the media and the fundus.

pantoscopic angle

Eyewear; Optometry

1. Angle in the vertical plane between the optical axis of a spectacle lens and the visual axis of the eye in the primary position, usually taken to be the horizontal. 2. Angle ...