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  2. Illusory motion - Wikipedia

    en.wikipedia.org/wiki/Illusory_motion

    Illusory motion is perceived as movement in a number of ways. The first can manifest through the retinal image where the motion flows across the retinal mosaic. The perceived motion can also manifest by the eyes changing position. In either case, an aftereffect may occur. [5] Peripheral drift illusion is another variety of perceived movement in ...

  3. Illusions of self-motion - Wikipedia

    en.wikipedia.org/wiki/Illusions_of_self-motion

    The vestibular system is one of the major sources of information about one's own motion. Disorders of the visual system can lead to dizziness, vertigo, and feelings of instability. Vertigo is not associated with illusory self-motion as it does not typically make one feel as though they are moving; however, in a subclass of vertigo known as ...

  4. Optical illusion - Wikipedia

    en.wikipedia.org/wiki/Optical_illusion

    A familiar phenomenon and example for a physical visual illusion is when mountains appear to be much nearer in clear weather with low humidity than they are.This is because haze is a cue for depth perception, [7] signalling the distance of far-away objects (Aerial perspective).

  5. Geometrical-optical illusions - Wikipedia

    en.wikipedia.org/wiki/Geometrical-optical_illusions

    Necker cube = reversible figure Penrose triangle = unrealizable object Kanizsa triangle = illusory contours. Visual illusions proper should be distinguished from some related phenomena. Some simple targets such as the Necker cube are capable of more than one interpretation, which are usually seen in alternation, one at a time. They may be ...

  6. Peripheral drift illusion - Wikipedia

    en.wikipedia.org/wiki/Peripheral_drift_illusion

    The peripheral drift illusion (PDI) refers to a motion illusion generated by the presentation of a sawtooth luminance grating in the visual periphery. This illusion was first described by Faubert and Herbert (1999), although a similar effect called the "escalator illusion" was reported by Fraser and Wilcox (1979).

  7. Apparent motion - Wikipedia

    en.wikipedia.org/wiki/Apparent_motion

    Illusory motion, the appearance of movement in a static image Phi phenomenon , an illusion of movement created when two or more adjacent lights blink on and off in succession Stroboscopic effect , a phenomenon that occurs when continuous motion is represented by a series of short or instantaneous samples

  8. 'What Are UFOs' Examines Our Fascination with the Unknown - AOL

    www.aol.com/ufos-examines-fascination-unknown...

    Conspiracy debunker Mick West, author of Escaping the Rabbit Hole, theorizes that it’s not the object in the gimbal video that’s doing the moving but the camera that captured the image ...

  9. Autokinetic effect - Wikipedia

    en.wikipedia.org/wiki/Autokinetic_effect

    It was first recorded in 1799 by Alexander von Humboldt who observed illusory movement of a star in a dark sky, although he believed the movement was real. [2] It is presumed to occur because motion perception is always relative to some reference point, and in darkness or in a featureless environment there is no reference point, so the position ...