Paediatric ophthalmology fellowship, Hospital for Children, Toronto 1983-1984
Consultant Ophthalmologist Addenbrookes Hospital Cambridge 1986-2001
Fellow of Royal College of Surgeons England
Fellow of Royal College of Ophthalmologists
Fellow of Academy of Medical Sciences
Member of American Association of Paediatric Ophthalmology and Strabismus
Member of European Paediatric Ophthalmology Society
Member of International Society of Genetic Eye Disease
Duke Elder Professor of Ophthalmology, Institute of Ophthalmology, UCL London.
Honorary Consultant Ophthalmologist Moorfields Eye Hospital and Hospital for Children, Great Ormond Street.
Director of Paediatric Ophthalmology Service Moorfields Eye Hospital