Sean Cain

Sean Cain is the Matthew Flinders Professor of Sleep Health in the Flinders Health and Medical Research Institute (FHMRI Sleep Health). His research investigates how light shapes human circadian rhythms, sleep, and mental health, with a particular focus on the the impact of individual differences in sensitivity to light. His work spans laboratory circadian physiology, population-scale studies, and the translation of circadian science into real-world tools and interventions.

Professor Cain is known for demonstrating a more than fifty-fold range in circadian light sensitivity between individuals, and for co-leading a series of population-scale studies linking light exposure to a broad range of health outcomes. He has contributed to award-winning circadian technologies and to the development of new tools for measuring personal light exposure and circadian function. His current research includes deep circadian phenotyping of large cohorts, the role of real-world light exposure in driving circadian amplitude, and the application of circadian science to areas such as depression, sleep disorders, and youth mental health.

Professor Cain's research bridges fundamental discovery and practical impact, aiming to improve health through a better understanding of how light, timing, and the circadian system interact.