1. Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, Iowa City, IA, USA
2. Department of Ophthalmology and Visual Sciences, The University of Iowa Hospitals & Clinics, Iowa City, IA, USA
3. Department of Electrical and Computer Engineering, The University of Iowa, Iowa City, IA, USA
4. Departments of Neurology, Neurosurgery and Ophthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, USA