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  2. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    The Hering illusion (1861): When two straight and parallel lines are presented in front of radial background (like the spokes of a bicycle), the lines appear as if they were bowed outwards. Hollow-Face illusion: 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.

  3. Autostereogram - Wikipedia

    en.wikipedia.org/wiki/Autostereogram

    This is an example of a wallpaper with repeated horizontal patterns. Each pattern is repeated exactly every 140 pixels. The illusion of the pictures lying on a flat surface (a plane) further back is created by the brain. Non-repeating patterns such as arrows and words, on the other hand, appear on the plane where this text lies.

  4. Shepard elephant - Wikipedia

    en.wikipedia.org/wiki/Shepard_elephant

    Blivet illusion, another impossible figure based on figure-ground confusion. The image is widely reproduced and discussed. Brad Honeycutt, author of Exceptional Eye Tricks, calls the Shepard elephant "one of the most famous and classic optical illusions."

  5. Spectacular photos of Yosemite's 'firefall' optical illusion

    www.aol.com/article/lifestyle/2017/02/16/...

    These photos are breathtaking. By: Emily Drooby, Buzz60. It's not hot lava, it's an optical illusion! Every February, Horsetail Fall in Yosemite National Park lights up as if it were on fire.

  6. Ambiguous image - Wikipedia

    en.wikipedia.org/wiki/Ambiguous_image

    One of the earliest examples of this type is the rabbit–duck illusion, first published in Fliegende Blätter, a German humor magazine. [1] Other classic examples are the Rubin vase , [ 2 ] and the " My Wife and My Mother-in-Law " drawing, the latter dating from a German postcard of 1888.

  7. Thaumatrope - Wikipedia

    en.wikipedia.org/wiki/Thaumatrope

    A thaumatrope is an optical toy that was popular in the 19th century. A disk with a picture on each side is attached to two pieces of string. When the strings are twirled quickly between the fingers the two pictures appear to blend into one.

  8. Magic Eye - Wikipedia

    en.wikipedia.org/wiki/Magic_eye

    Cover of the first book. Magic Eye is a series of books that feature autostereograms.. After creating its first images in 1991, creator Tom Baccei worked with Tenyo, a Japanese company that sells magic supplies.

  9. Forced perspective - Wikipedia

    en.wikipedia.org/wiki/Forced_perspective

    This image makes the Paranal Observatory's laser guide stars' meeting point feel closer than it really is. In reality, the beams extend to an infinite distance. Forced perspective is a technique that employs optical illusion to make an object appear farther away, closer, larger or smaller than it actually is.