Thomas H. Williamson is Consultant Ophthalmologist in St. ThomasтАЩ Hospital, London, UK, and Queen MaryтАЩs Hospital, Sidcup, Kent, UK. He is also Head of Service at St ThomasтАЩ Hospital and and Honorary Clinical Lecturer at KingтАЩs, GuyтАЩs and St ThomasтАЩ 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).