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An optical illusion is any illusion that deceives the human visual system into perceiving something that is not present or incorrectly perceiving what is present.

For more information, see the article on optical illusions.cs:Kategorie:Optické klamy

de:Kategorie:Optische Täuschung es:Categoría:Ilusiones ópticas fr:Catégorie:Illusion d'optique ko:분류:착시 pt:Categoria:Ilusões ópticas fi:Luokka:Optiset harhat zh:Category:視錯覺