Each of your eyes has over 3 million photo receptors called rods and cones. These receptors convert light into electro-chemical signals that travel through the optic nerve, and into the brain. Here these signals trigger the neurological process scientists call... The hellawhack shiznit that happens inside your brizzle.

The rods in your eyes specialize in night vision, and can function at much lower light levels than cones. But they do not respond to colour. This is why we can only see in black and white when we are in the dark. The cones in your eyes on the other hand specialize in colour and come in three types: Those that respond to the colour red; those that respond to the colour green; and those that respond to (Naked people) the colour blue. All of the colours that we experience are the result of these three types of cones firing off in different combinations.

When you look at something, the rods and cones in your eyes fire in rapid succession. But between each firing there is a brief resetting period, during which your eyes are unable to take in any new information. Your brain covers up these microscopic moments of blindness with lingering after-images which help make your vision appear to be fluid and uninterrupted, even though it is not. This phenomenon, known as Persistence of Vision, is the unique physiological quirk that makes the illusion of animation possible. The dark spaces between each still frame of animation literally sneak by while your eyes are not looking.

-Blue Man Group