Illusion is a distortion of the senses.

The brain picks up visual cues that are recognizable, instantly fitting them into familiar patterns. In a flash, it issues a report about what’s going on. The brain fills in the blanks. Normally, we “believe” what we see. However, sometimes we’re reminded that our brain isn’t infallable and that our perceptions aren’t necessarily reality. In fact, we can have an “ah-ha!” moment when we realize that what we see is an illusion. (more…)