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:
“Allowing children to spew forth whatever is on their minds in the name of openness only creates an illusion of family closeness.”
—Neil Kurshan (20th century)
“As with our colleges, so with a hundred “modern improvements”; there is an illusion about them; there is not always a positive advance. The devil goes on exacting a compound interest to the last for his early share and numerous succeeding investments in them.”
—Henry David Thoreau (1817–1862)
“An illusion which is a real experience is worth having.”
—D.H. (David Herbert)