Visual Illusions, also called Optical Illusions are basically games the eyes play with our brains. They take many forms, 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. Visual Illusions with a descriptive introduction, then details thirty of the most common examples of these Illusions.