ILLUSIONS

Some illusions look like there moving but there not like the one below:

If u consontrate on them they turn into pitchers of people like the one below stare at the three dots in the middle for about 30 seconds then look at a flat surface and blink!! what did you see????

What is an illusion?

An optical illusion (also called a visual illusion) is characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a percept that does not tally with a physical measurement of the stimulus source. There are three main types: literal optical illusions that create images that are different from the objects that make them, physiological ones that are the effects on the eyes and brain of excessive stimulation of a specific type (brightness, tilt, color, movement), and cognitive illusions where the eye and brain make unconscious inferences. They can also be known as "mind games"