The rays are not coloured: essays on the science of vision and colour

Historical Significance: W D Wright (1906-1997) was one of the greats in the field of normal and abnormal colour vision. He stands in the succession of Young, Helmholtz, Maxwell, Abney and Parsons in unravelling the mysteries of colour vision. He was a physicist and Professor of Applied Optics at the Imperial College of Science and Technology, London. He was one of the founders of the CIE 1931 system of colorimetry. His book 'Researches on normal and abnormal colour vision' 1946 was very influential and his book ' Measurement of Colour' 1944 went to numerous editions. He was an honorary life member of the Victorian College of Optometry.