In this exhibition, 25 works from the 1960s demonstrate how Op was the first movement to explore new understandings of the psychology and science of perception. Viewer participation in today's digital ...

The room convulsed in fuzzy, static-like patterns. Every stool and wall shook as though they had just came in from the sub-zero cold. But the room wasn’t moving; this perception-pounding trip was ...

MAN’S eyes are not windows, although he has long regarded them as such. They can be baffled, boggled and balked. They often see things that are not there and fail to see things that are. In the eyes ...