Richard Gregory was a prominent British psychologist and cognitive scientist, known for his work in the field of visual perception. He was born on February 24, 1923, and passed away on May 17, 2010. Gregory's research focused on how humans interpret visual information and the ways in which our brains construct our perception of reality. He is best known for his book, Eye and Brain, published in 1966, which explored the relationship between visual perception and cognitive processes. Gregory's theories contributed significantly to the understanding of optical illusions and how our minds can be tricked by visual stimuli, influencing both psychology and art.