Optical illusion is a fascinating phenomenon that has puzzled humans for centuries. It refers to a visual perception that tricks the eyes and the brain into interpreting an image differently than its actual form. There are several synonyms for the term "optical illusion" that describe this phenomenon. Some of these include visual illusion, perceptual illusion, trompe-l'oeil, magic eye, mirage, and false impression. All of these terms describe a situation where our minds are deceived by the visual input we receive. Whether it's in the form of a painting, photograph, or natural phenomenon, optical illusions continue to captivate our minds and challenge our perception of reality.