- optical illusion
- The term optical illusion is used in a narrow and a broad sense. In the narrow sense, it denotes an illusion attributable to the optics of the eye. In the broad sense, it is used as an equivalent of the term "visual illusion, denoting any aberrant visual percept that has a basis in an object or stimulus deriving from the extracorporeal environment. This broad class is sometimes divided into "physical, "physiological, and "cognitive optical illusions. The latter division is based on the conventional assumption that some illusions tend to occur as a natural consequence of the physical properties of an object or stimulus, whereas others depend on the inherent workings of the perceptual system or on the interaction between the perceptual input picture and the mind's (or brain's) unconscious inferences pertaining to the nature of the physical world. However, in all three cases a percept is created that differs from the physical measurements of the stimulus source at hand. Depending on the guiding principles employed, optical illusions can be further divided into subgroups such as the "ambiguous illusion, "distortion illusion, "geometric-optical illusion, "paradox illusion, and "fiction illusion. Some well-known examples of optical illusions are the "Müller-Lyer illusion, the "Oppel-Kundt illusion, the "Poggendorff illusion, and the "Zöllner illusion. The German physicist Johann Joseph Oppel (1815-1894) has been credited with initiating the scientific study of optical illusions in 1854, after his attention had been drawn to certain regularly recurring flaws in his students' drawings.ReferencesGregory, R.L. (1991). Putting illusions in their place. Perception, 20, 1-4.Oppel, J.J. (1854/1855). Ueber geometrischoptische Täuschungen. (Zweite Nachlese.) In: Jahres-Bericht des physikalischen Vereins zu Frankfurt am Main, 37-47.Rutten, F.J.Th. (1929). Psychologie der waarnem-ing. Een studie over gezichtsbedrog. Thesis University of Utrecht.
Dictionary of Hallucinations. J.D. Blom. 2010.
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optical illusion — optical illusions N COUNT An optical illusion is something that tricks your eyes so that what you think you see is different from what is really there. Sloping walls on the bulk of the building create an optical illusion … English dictionary
optical illusion — n. an illusion resulting from certain visual effects that cause a viewer to misunderstand or misinterpret what he or she actually sees * * * … Universalium
optical illusion — n. an illusion resulting from certain visual effects that cause a viewer to misunderstand or misinterpret what he or she actually sees … English World dictionary
optical illusion — n visual perception of a real object in such a way as to misinterpret its actual nature … Medical dictionary
optical illusion — ► NOUN ▪ a thing that deceives the eye by appearing to be other than it is … English terms dictionary
Optical illusion — This article is about visual perception. For the Time Requiem album, see Optical Illusion (album). An optical illusion. The square A is exactly the same shade of gray as square B. See checker shadow illusion. An optical illusion (also called a… … Wikipedia
optical illusion — noun an optical phenomenon that results in a false or deceptive visual impression • Hypernyms: ↑optical phenomenon • Hyponyms: ↑apparent motion, ↑motion, ↑apparent movement, ↑movement, ↑mirage * * * noun, pl ⋯ sions [c … Useful english dictionary
optical illusion — UK / US noun [countable] Word forms optical illusion : singular optical illusion plural optical illusions something that looks very different from what it really is, usually because of the way that it is drawn or lit … English dictionary
optical illusion — optinė apgaulė statusas T sritis fizika atitikmenys: angl. optical illusion vok. optische Täuschung, f rus. обман зрения, m; оптическая иллюзия, f pranc. illusion optique, f … Fizikos terminų žodynas
optical illusion — miražas statusas T sritis ekologija ir aplinkotyra apibrėžtis Optinis atmosferos reiškinys, kai prie horizonto matomas menamasis objekto vaizdas. Susidaro dėl perkaitusio oro tankio netolygumo ir šviesos spindulių, einančių nuo objekto, išlinkimo … Ekologijos terminų aiškinamasis žodynas