Have you ever looked at something, and it appears normal, but after a few minutes of thinking about it, you find it distorted? The brain and eyes are two organs that work together constantly. Two sources feed visual information to the brain:the eyes and the brain's memory of past experience. Usually the information is clear enough, and you have no difficulty figuring out what you 're looking at. Sometimes howeber, the information is faulty. Perhaps nothing in your brain can interpret the clues that come to it. When this occurs your brain comes up with a guess about what it thinks it sees. At this poiint a visual or optical illusion is ocurring. The major tools that make optical illusions possible are lines, circles, and colors.…
