An Ames room is a room built in a distorted manner that produces differing visual illusions. Named after Adelbert Ames, Jr. an Ames room produces two illusions to observers. The first is that the room appears like a cube from a certain angle (seen by looking through a peephole) although the room is a trapezoid in reality. The second visual illusion is that when an individual or object is moved from one corner to another corner they appear to grow or shrink in size. Ames rooms are used to study optical illusions and differing perceptions in individuals.