To mark the occasion of Michael Kidner's 90th birthday, Flowers East staged a major retrospective exhibition, celebrating an enduring career and exceptional contribution to the arts. A pioneer of Optical Art, Kidner has devoted much of his career to developing work of a constructive nature. His interest in mathematics, science and the theories of chaos has determined an art that is both formal and playful. The curiosity of his mind is matched by his willingness to accept the unexpected outcome. Examples of work from all periods of his career, from the 1950s to the present, were included in the exhibition (these include After Image, Stripe/Moiree, Wave, Series, Column, Lattice, Elastic Fixed and Flexible Frame and Pentagon). The show comprised paintings, works on paper, sculpture and prints.