A Modern acrylic painting on canvas depicting an abstract gradient composition in yellow, green and blue shades in the manner of Op Art style. Unsigned. Optical art, an abbreviated version of Op Art, is an artistic movement of the second half of the 20th century that uses various optical illusions based on the features of the perception of flat and spatial figures. Leading figures in the movement include Bridget Riley, Victor Vasarely and Jesus Rafael Soto. One of a kind artwork.