Professor John Marshall is a towering figure in ophthalmology, a visionary whose groundbreaking work has transformed vision care for millions worldwide.

Born in 1943, this pioneering retinal specialist and inventor dedicated his career to understanding and treating the eye’s most delicate structures, particularly the retina. His early research on laser-induced retinal damage laid the foundation for revolutionary technologies that now restore sight and prevent blindness on a global scale.

As Emeritus Professor of Ophthalmology at University College London and King’s College London, where he held prestigious chairs including the Frost Professorship, Professor Marshall is best known for inventing and patenting the excimer laser—the technology behind LASIK and other refractive surgeries that have restored clear vision to over 70 million people. His contributions also include the development of the world’s first diode laser for treating conditions such as diabetic retinopathy, glaucoma, and age-related macular degeneration, as well as pioneering the 2RT laser for managing dry AMD.

With over 500 publications, more than 55 patents, and the mentorship of 60 PhD students who have gone on to become leaders in the field, his influence is profound. He has been honoured with an MBE for services to ophthalmology, the Bowman Medal, numerous lifetime achievement awards, and fellowships in leading academies. Now in his 80s, his legacy continues to shape the future of retinal science and preserve sight for countless patients worldwide.