All his life, Victor Vasarely was interested in technological and scientific progress and more particularly in the conquest of space. With OND, Vasarely creates the illusion of the third dimension. The artist evokes the elusive universe of galaxies and the pulsation of a biological mutation of the cell. To amplify this optical phenomenon, Vasarely plays with tonal gradients, exploiting the visual principles of color and light. Thus, the light colors advance while the dark ones retreat.