Try out some of the experiments referred to by Professor Ramachandran.
Blindspot Experiments
Each eye has a blindspot. It's caused by the fact that the small area of the retina where the optic nerve is connected to the eyeball is not sensitive to light.
The following experiments prove the existence of the blindspot and demonstrate how the brain can fill in the missing information. They provide important hints about how the neural machinery of the brain works in practice.
All experiments are taken from V.S. Ramachandran's book, Phantoms In The Brain, published by Fourth Estate.
Vision experiments (from the Science Museum) Try your hand (or rather your eye) on The Stroop Effect and other illusions from the London Science Museum.
Seeing (Vision experiments from the San Francisco Exploratorium) Watch "The Disappearing Act" at the website of the San Francisco Exploratorium.
