Representing the artist’s continued exploration of colour and form, ‘Large Fragment 2’ with overlapping its waves creating a sense of rhythmic movement and harmony. The work gives the impression of a three-dimensional space unfolding before the viewer's eyes producing one of Riley’s iconic optical effects.

By juxtaposing complementary or contrasting hues, Riley creates visual tension and depth within her artworks, imbuing her work with a sense of energy. Her exploitation of optical illusions makes her 2D canvases move, vibrate and sparkle, allowing the viewer to reflect on how they feel physically when observing. This was the main goal of the optical art movement, which became popular in the 1960’s through the works of Riley, Victor Vasarely and Richard Anuskiewicz.