2. Op Art is a movement from the 1960s which used precise geometrical
patterns painted in vivid colours or black and white to create optical
illusions of movement and fool the viewer's sense of perspective.

3. Artists use the properties of warm colours which appear to advance
and cool colours which appear to recede in these illusions.

4. Key artists include
Bridget Riley, Victor Vasarely, Julian
Stanczak and Patrick Hughes.
Op Art had a revival in the 1980s
through artist such as Philip Taaffe
and Peter Schuyff.