1. Op Art or Optical Art

2. A twentieth century art movement and style in which artists sought to create an impression of movement on the picture surface by means of optical illusion. Op Art or Optical Art:

3. Op Art or Optical Art Maurits Cornelis Escher (Dutch, 1898-1972), Balcony, 1945, lithograph, 11 3/4 x 9 1/4 inches (29.7 x 23.4 cm), National Gallery of Art, Washington, DC. In the center of this picture of a hillside town, Escher said he tried to break up the paper's flatness by "pretend[ing] to give it a blow with my fist at the back, but... the paper remains flat, and I have only created the illusion of an illusion."

4. Op Art or Optical Art Victor Vasarely, Quasar-Fugue, 1966- 1973, oil on canvas, 150.5 x 150.5 cm, Tehran Museum of Contemporary Art, Iran.

5. Op Art or Optical Art Victor Vasarely

6. Op Art or Optical Art Victor Vasarely, Blue-Black

7. Op Art or Optical Art Victor Vasarely, Blue / Red, 1983, silkscreen,

8. Op Art or Optical Art Victor Vasarely,

9. Op Art or Optical Art