As one of the abstract styles developing in the 1960s, Optical illusion (or Op) Art features games of lines and geometric shapes in both black and white—like in the case of Bridget Riley, Jesús Rafael ...

Jesús Rafael Soto plays a starring role in Artnet Auctions' Contemporary Editions sale with five dynamic works.

Red, Green, and Blue Twisted Curves, 1979. The “spectator who looks at my work is part of the work itself,” Riley has said. Collection of the artist. ©Bridget ...

The pieces recall the visual hijinks of op art. “I’m also trying to get vision to go on the fritz, so to speak,” the artist said. Kim has also been crafting prints in biology labs ...