The Dreammachine

The dreamachine has a similar affect that the strobe lights due on our eyes. Bascially, it's a tube (originally) and it is a on platform that spins really fast. The tube itself has slits on the side that lets light from the middle of the tube spill out. As the tube spins very fast, the lights begin to blur and when a person closes their eyes they start to see different colors and shapes. It is even said to bring on a hypnotic state to the person. It was created based on a book called The Living Brain, by William Grey Walters, and was produced by two artists: Brion Gysin and Ian Sommerville. Unfortunately, it is recorded (in wikipedia) that 1 in every 10,000 adults will have a siezure while viewing the dreamachine, and even more with kids. It is also a good source of epilepsy.