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  2. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    The Hollow-Face illusion is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face. Hybrid image: A Hybrid image is an optical illusion developed at MIT in which an image can be interpreted in one of two different ways depending on viewing distance. Illusory contours

  3. Fata Morgana (mirage) - Wikipedia

    en.wikipedia.org/wiki/Fata_Morgana_(mirage)

    As is well known, atmospheric ducting is the explanation for certain optical mirages, and in particular the arctic illusion called "fata morgana" where distant ocean or surface ice, which is essentially flat, appears to the viewer in the form of vertical columns and spires, or "castles in the air". People often assume that mirages occur only ...

  4. Optical illusion - Wikipedia

    en.wikipedia.org/wiki/Optical_illusion

    Optical illusion is also used in film by the technique of forced perspective. Op art is a style of art that uses optical illusions to create an impression of movement, or hidden images and patterns. Trompe-l'œil uses realistic imagery to create the optical illusion that depicted objects exist in three dimensions.

  5. Troxler's fading - Wikipedia

    en.wikipedia.org/wiki/Troxler's_fading

    Troxler's fading, also called Troxler fading or the Troxler effect, is an optical illusion affecting visual perception. When one fixates on a particular point for even a short period of time, an unchanging stimulus away from the fixation point will fade away and disappear. Research suggests that at least some portion of the perceptual phenomena ...

  6. Op art - Wikipedia

    en.wikipedia.org/wiki/Op_art

    Op art, short for optical art, is a style of visual art that uses optical illusions. [1] Op artworks are abstract, with many better-known pieces created in black and white. Typically, they give the viewer the impression of movement, hidden images, flashing and vibrating patterns, or swelling or warping.

  7. Spectropia - Wikipedia

    en.wikipedia.org/wiki/Spectropia

    Plate XIV. Brown was distressed by an increased public interest in spiritualism, [7] something which he deemed a "mental epidemic." [8] By offering a scientific explanation on the properties of light, color, and the structure of the eyes, [1] he states in the section "Popular and Scientific description" that the purpose in writing Spectropia was to bring forth "the extinction of the ...

  8. Hidden face - Wikipedia

    en.wikipedia.org/wiki/Hidden_face

    There are everyday examples of hidden faces, they are "chance images" including faces in the clouds, figures of the Rorschach Test and the Man in the Moon. Leonardo da Vinci wrote about them in his notebook: "If you look at walls that are stained or made of different kinds of stones you can think you see in them certain picturesque views of mountains, rivers, rocks, trees, plains, broad ...

  9. Illusion - Wikipedia

    en.wikipedia.org/wiki/Illusion

    The term illusion refers to a specific form of sensory distortion. Unlike a hallucination, which is a distortion in the absence of a stimulus, an illusion describes a misinterpretation of a true sensation. For example, hearing voices regardless of the environment would be a hallucination, whereas hearing voices in the sound of running water (or ...