The art of drawing, graphics, painting and sculpture are meant for visual perception.
Edit In psychiatry the term illusion refers to a specific form of sensory distortion. Unlike an hallucinationwhich is a sensory experience in the absence of a stimulus, an illusion describes a distortion of a perception so it is understood and interpreted differently.
For example, hearing voices regardless of the environment would be an hallucination, whereas hearing voices which arise only from the sound of running water or other auditory source would be an illusion. In a word linking the blurred perception of reality resulting from small doses of hallucinogenic drugs was coined by Liam Carney.
These " illusionations " are not hallucinations in the strict sense of the word since they are not novel fabrications of the mind but rather a distortion of what is seen and heard. Stage magic is a popular form of entertainment based on illusion. Magicians use tricks to give their audiences the impression that seemingly impossible events have occurred.
Stare at the center of this, it seems that the circles are slowly moving in clockwise small circle and counter clockwise large circle See also.Essay Seeing Illusory Stripes and Spots Mach Bands.
Seeing is not always believing. Sometimes our eyes play tricks on us, and the illusions that we see can be quite informative about the neural operations that the visual system carries out.
Common pathological visual illusions are persistence or repetition of a visual picture following the exterior stimulant is no longer in sight, observing many pictures upon observing one item, transposition of visual pictures from one place to another, and distortion in color comprehension.
Optical Illusions essaysThe question "What is an illusion?" is one that, at first glance, is strikingly simple to answer. Yet, it has eluded many a psychologist until the latter half of the twentieth century, when the workings of our psyche and the processes that underlie it became appare.
Essay on Optical Illusions Cheryl Blackwell Seminar November Optical Illusions An illusion is the distorted perception of a stimulus. They are not to be confused with hallucinations, which are false perceptions when there is no presence of a stimulus, in contrast, illusions are.
The first example is the Muller-Lyer illusion which is an optical illusion consisting of stylized arrows in which viewers tend to perceive one as longer than the other.
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Almost all the leading researchers in the field worldwide have contributed, with essays on the history of visual illusions, up-to-the-minute, detailed discussions of a comprehensive range of illusions and effects, and philosophical essays on whether the word illusion is really the right term to describe them.