“[He] was part of a circle of mid-century geometric abstractionists active in Ohio that included Julian Stanczak … Like Stanczak, Mieczkowski participated in the pivotal 1965 exhibition ‘The Responsive Eye’ at the Museum of Modern Art in New York, which launched Op Art. Mieczkowski co-founded the Anonima group in 1960 in Cleveland with painters Ernst Benkert and Francis Hewitt.”