Optical illusions work by using color, light, patterns and other variables to form pictures that deceive the brain. The eyes collect information that the brain attempts to understand, and the misleading information produces a perception that’s different from the objective reality.Continue Reading
Perception refers to an individual’s understanding of what he sees through the sense of sight. People usually see deceptive visual effects in physiological optical illusions, which are illusions resulting from a physical method.
Cognitive illusions, also called mind games, are illusions that happen when the brain instantly makes a perception according to the information received from the eyes. Some cognitive illusions are ambiguous, which means the objects in the illusions can be interpreted in different ways. Distortion of cognitive illusions involves various techniques to present objects of the same size or length in a contorted picture. Paradox illusions refer to images and objects that cannot occur in reality.
Many illusions are created by the refraction of light, which passes through substances at considerably different speeds. Light bends as it travels through a transparent channel, such as air, to another medium, such as water. For example, a pencil placed in a container filled with water appears bent at the surface, and a log that’s partly immersed in the water looks like it’s deformed.Learn more about Optics & Waves
Optical illusions are caused by a mismatch of what the eyes see and what the brain interprets, according to ABC News. The brain is often tricked into thinking something is moving when contrasting colors are placed in close proximity to each other and repeated. This is why when people want a pattern to move like an optical illusion, the shapes of the pattern are outlined in black and white.Full Answer >
Lateral inversion is the visual illusion that left and right sides of a mirror image are switched. A person looking in a flat plane mirror who raises his right hand sees his mirror image's left-side hand raise.Full Answer >
Optical illusions have been found in cave paintings, so an optical illusion is not considered an invention but instead is the result of man imitating the geometric forms seen in nature through architecture and art. Arab astronomer Alhazen wrote about the optical illusions in the sky in the 10th century.Full Answer >
The theme of Katherine Mansfield's short story, "Miss Brill," is the contrast of illusion and reality, and is based on the need of the story's eponymous namesake for constructing romanticized illusions as part of her personal denial of reality. Miss Brill, an Englishwoman and spinster in a foreign country who tutors children, compensates for her loneliness by projecting herself into the lives of the strangers she observes around her. She has a need for love and a connection to others, but her needs remain repressed and frustrated.Full Answer >