Dr. Joyce is a research psychologist at the University of Nevada, Reno who studies the way that light affects human health and wellbeing. He draws from the fields of vision science, sleep and circadian sciences and psychology to understand how light is sensed and interpreted by the brain for non-image forming functions. Such functions include setting circadian rhythms for restful sleep, as well as optimizing mood and cognitive performance based on the time of day. He aims to use this knowledge to understand how dysfunction in this system contributes to diseases of ageing, as well as to develop light environments that maximize wellness in the home and workplace.