1. Op Art
Optical Art

2. Bridget Riley, Movement in Squares, tempura on hard board, 1961*

3. Op Art
Optical art is a method of painting concerning the interaction between illusion and picture plane, between understanding and seeing."[2] Op art works are abstract, with many of the better known pieces made in only black and white. When the viewer looks at them, the impression is given of movement, hidden images, flashing and vibration, patterns, or alternatively, of swelling or warping.

4. Origin of the term Op Art
The term first appeared in print in Time magazine in October 1964 in response to Julian Stanczak's show of Optical Paintings at the Martha Jackson gallery.

5. Julian Stanczak, African Village, acrylic on board, 1953

6. Julian Stanczak, Passing Contour, acrylic on board, 1962

7. Julian Stanczak, Rain and Reflection, acrylic on board, 1962

8. Victor Vasarely, Illusion, enamel and steel, 2005

9. Frank Stella, The Marriage of Reason and Squalor II, enamel on canvas, 1959

10. Op Art’s origins
Op Art grew out of the minimalist movement which grew out of the Bauhaus movement.
Bauhaus is an architectural movement concerned with pure form and mathematic purity.

11. Federal Plaza in Chicago, buildings by Mies van der Rohe, scultpure by Alexander Calder

12. Landscapes of the mind and optical illusion

13. M.C. Escher, Relativity, pencil on paper, 1953