An optical illusion may seem mind-boggling at the first sight though the answer comes to mind when you clearly see the image. Your perception of something is different from what an object actually is, this is known as an optical illusion. There are various kinds of optical illusions. Literal optical illusions are typically created by combining a number of different images.
A person may perceive elements of an image that are not truly there due to physiological illusions. Cognitive illusions use a person's worldview assumptions to produce optical illusions.
