Part 1 of this five-part series of shorts introduces the world of the visual scientist. Beyond boggling your mind, Prof. Arthur Shapiro explains how and why you see what you see -- and what part of what you see is actually "real", as opposed to how your mind fills in the blanks.

In part 2 of this five-part series of shorts, Prof. Arthur Shapiro takes us through visual illusions that show how our brain processes retinal impressions from light and dark. Watch as things "move" while they are standing still. It will be hard to believe your eyes after watching this program!

In the final short program of the series, Prof. Shapiro offers us more challenging questions about the way we see as he shows us how light that hits the retina is interpreted by the brain. Can you see something before you know what you are looking at? Check out these illusions and find out!

Professor Shapiro shows us how some images can prompt two, or even three, equally valid interpretations. Rather than settling on one interpretation, our brains tend to switch among all of them – leading to some baffling and astonishing visual experiences.