1. Department of Electrical and Computer Engineering, The University of Iowa, Iowa City, IA, USA
2. Iowa City VA Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, Iowa City, IA, USA
3. Department of Molecular Physiology and Biophysics, The University of Iowa, Iowa City, IA, USA
4. Department of Biostatistics, The University of Iowa, Iowa City, IA, USA
5. Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, IA, USA