Op artArt refers to a diverse range of human intellectual and expressive activities and the outcomes of those activities. Within this context art is further defined... stands for ‘optical art’ and is an art formForm refers to three dimensional objects. While shapes have two dimensions (height and width), forms have three dimensions (height, width and depth). The overall unity... based on abstractWhen applied to art, it usually refers to work which is not representational. Abstract art is concerned with ideas that are drawn away from everyday... geometric patterns, usually lines circle sand squares painted in strongly contrasting colours. The effect of such pictures is such that it produces optical shimmers, flickering and after-images in the eye of the spectator. Bridget Riley and Victor Vasarely are leading exponents of this style.