Explain the difference in illusions and hallucinations and when they typically occur, and describe under what circumstances "sane hallucinations" occur

What will be an ideal response?

Answer will include that perceptual misconstruction is responsible for a number of illusions. In an illusion, length, position, motion, curvature, or direction is consistently misjudged. Thus, illusions are distorted perceptions of stimuli that actually exist. In a typical hallucination, people perceive objects or events that have no external reality. For example, they hear voices that are not there. Hallucinations are a major symptom of psychosis, dementia, epilepsy, migraine headaches, alcohol withdrawal, and drug intoxication. They are also one of the clearest signs that a person has "lost touch with reality." Curiously, "sane hallucinations" also occur. Charles Bonnet syndrome is a rare condition that afflicts mainly older people who are partially blind, but are not mentally disturbed. Animals, buildings, plants, people, and other objects may seem to appear and disappear in front of their eyes. However, people experiencing "sane hallucinations" can more easily tell that their hallucinations are not real because their capacity for reality testing is not impaired. Such unusual experiences show how powerfully the brain seeks meaningful patterns in sensory input and the role that reality testing plays in our normal perceptual experience.