American painter, among the originators of Op art, a style of painting concerned with visual sensation and the effect of optical illusion.

Anuszkiewicz studied at the Cleveland Institute of Art (1948–53), the Yale University School of Art and Architecture (1953–55), and Kent State University (B.S. in education, 1956). In 1967 he was artist in residence at Dartmouth College, Hanover, N.H., and later taught at the University of Wisconsin, Cornell University, and Kent State University.

Anuszkiewicz' canvases depict tight geometric shapes in vivid colours that seem to shift under the eye. His “All Things Live in the Three” (1963) has three orange diamonds with green dots on a background of red with blue dots and with red patterns in the orange diamonds.