1 Save Sight Institute, University of Sydney, NSW, Australia; Australian School of Advanced Medicine, Macquarie University, NSW, Australia; Concord Repatriation General Hospital, Concord NSW, Australia; Retina Associates, Chatswood, NSW, Australia. Electronic address: rmerani@med.usyd.edu.au.
2 The University of Newcastle, Newcastle, NSW, Australia; Newcastle Eye Hospital, Newcastle, NSW, Australia.