Her early work was figurative and semi-impressionist. Between 1958 and 1959, her work at the advertising agency showed her adoption of a style of painting based on the pointillist technique. Around 1960, she began to develop her signature Op Art style consisting of black and white geometric patterns that explore the dynamism of sight and produce a disorienting effect on the eye and produces movement and colour. In the summer of 1960, she toured Italy with her mentor Maurice de Sausmarez, and the two friends visited the Venice Biennale with its large exhibition of Futurist works.