Another art movement was developed in the United States in the mid- 1960s . Optical Art (or Op Art, as it is more well- known) is a style that combines color and abstract patterns to create an impression of movement on the pictures surface by means of powerful optical effects and illusions. Optical illusion is an illusion caused by the visual system and characterized by a visual percept that appears to differ from reality.
A rtists use shapes , colors (usually black and white ), and patterns in special ways to create images that looks as if they are moving. In traditional paintings, the aim was to draw the viewer into the work. In contrast, Op Art pictures seem to move , vibrate or both, and reach out to the viewer.