1. University of Leicester Ulverscroft Eye Unit, School of Psychology and Vision Sciences, University of Leicester, Robert Kilpatrick Clinical Sciences Building, Leicester Royal Infirmary, Leicester, United Kingdom
2. Medical Physics and Clinical Engineering, Nottingham University Hospitals NHS Trust, United Kingdom
3. Eye Center, Freiburg University, Killianstraße 5, Freiburg, Germany
4. Gonville and Caius College, University of Cambridge, Cambridge, United Kingdom
5. Cooper University Hospital, Camden, United States