American artist Edna Andrade has died, the Locks Gallery has announced. She was 91, and lived in Philadelphia. A representative of the Optical art movement of the 1960s, Andrade was productive well into old age. Her work has been shown at Locks, the ICA and the Philadelphia Museum of Art, which owns her Night Sea.
She once wrote: "With the new art, paintings are no longer to be looked at - or into. They possess positive action."
(Pictured: "Finale," from 1979.
