Tomas Ilginis1, Pearse A Keane2, Adnan Tufail2. 1. Medical Retina Service, Moorfields Eye Hospital NHS Foundation Trust, London, England2Department of Ophthalmology, Glostrup Hospital, Glostrup, Denmark. 2. National Institute for Health Research, Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust, London, England4Institute of Ophthalmology, University College London, London, England.