Thomas H. Williamson is Consultant Ophthalmologist in St. Thomas’ Hospital, London, UK, and Queen Mary’s Hospital, Sidcup, Kent, UK. He is also Head of Service at St Thomas’ Hospital and and Honorary Clinical Lecturer at King’s, Guy’s and St Thomas’ Medical Schools. Further, he is one of two vitreoretinal specialists in a high volume tertiary referral service for south-east London and Kent (approximately 800 operations per year). He already published a book on Self-Assessment in Ophthalmology, wrote various book chapters and papers. Thomas H. Williamson is also webmaster of a patient information website providing details of vitreoretinal diseases and surgery (www.retinasurgery.co.uk).