1. Vision Center of Excellence, Defense Health Agency, Research and Engineering , Bethesda, MD 20889-5629, USA
2. Academic Department of Military Surgery and Trauma, Royal Centre for Defense Medicine , Birmingham B15 2GW, UK
3. Ophthalmology Department, University Hospitals Birmingham NHS Foundation Trust , Birmingham B15 2GW, UK
4. Neuroscience and Ophthalmology, Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham , Birmingham B15 2TH, UK
5. Blanchfield Army Community Hospital, US Army , Fort Campbell, KY 42223, USA