Shyamanga Borooah MBBS MRCP (UK) MRCSEd FRCOphth PhD Medical Retina Fellow Specialist Trainee in Ophthalmology, Princess Alexandra Eye Pavillion, Edinburgh, UK Peng Yong Sim BMedSci (Hons) MBChB (Hons) PGCert Clin Ed Foundation Doctor, Royal Free London NHS Foundation Trust, London, UK Mark Wright MBChB (Aberdeen) FRCSEd Consultant Ophthalmologist, Princess Alexandra Eye Pavilion, Edinburgh, UK Baljean Dhillon BMedSci (Hons) BM BS (Nottingham) FRCSEd FRCPS (Glas) FRCOphth Professor of Clinical Ophthalmology, University of Edinburgh, Honorary Professor, Heriot-Watt University, Honorary Consultant Ophthalmologist, Princess Alexandra Eye Pavilion, Edinburgh, UK