Professor John Marshall is the Frost Professor of Ophthalmology at the Institute of Ophthalmology in association with Moorfield’s Eye Hospital, University College London. He is Emeritus Professor of Ophthalmology at King’s College London, Honorary Distinguished Professor University of Cardiff, Honorary Professor the City University and Honorary Professor Glasgow Caledonian University.
Primarily, he has concentrated his research on the inter-relationships between light and ageing, the environmental mechanisms underlying age-related, diabetic and inherited retinal disease, and the development of lasers for use in ophthalmic diagnosis and surgery.
He invented and patented the revolutionary Excimer laser for the correction of refractive disorders. He also created the world’s first Diode laser for treating eye problems of diabetes, glaucoma and ageing.