Illusion
An illusion is a distortion of the senses, revealing how the brain normally organizes and interprets sensory stimulation. While illusions distort reality, they are generally shared by most people. Illusions may occur with more of the human senses than vision, but visual illusions, optical illusions, are the most well known and understood. The emphasis on visual illusions occurs because vision often dominates the other senses. For example, individuals watching a ventriloquist will perceive the voice is coming from the dummy since they are able to see the dummy mouth the words. Some illusions are based on general assumptions the brain makes during perception. These assumptions are made using organizational principles, like Gestalt, an individual's ability of depth perception and motion perception, and perceptual constancy. Other illusions occur because of biological sensory structures within the human body or conditions outside of the body within one’s physical environment.
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Famous quotes containing the word illusion:
“It isn’t safe to sit in judgment upon another person’s illusion when you are not on the inside. While you are thinking it is a dream, he may be knowing it is a planet.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)
“An illusion which is a real experience is worth having.”
—D.H. (David Herbert)
“We’re born alone, we live alone, we die alone. Only through our love and friendship can we create the illusion for the moment that we’re not alone.”
—Orson Welles (1915–1984)