John is an eminent vision scientist. His many contributions include psychophysical measurement of the human contrast sensitivity function, neurophysiological investigations into spatial frequency selectivity, and pioneering analytical methods that provide seminal insights into the nature of visual processing. The importance of John's work has been recognised by the Friedenwald award of the Association for Research in Vision and Ophthalmology, and the Tillyer award of the Optical Society of America. John was elected a Fellow of the Royal Society in 2003.
Craik Club 2008: Application of Fourier Analysis to the Visibility of Gratings