1. From VisionQuest Biomedical LLC, Albuquerque, New Mexico;
2. From VisionQuest Biomedical LLC, Albuquerque, New Mexico; the 2Department of Electrical & Computer Engineering, University of New Mexico, Albuquerque, New Mexico;
3. the Department of Engineering, St. Mary's University, San Antonio. Texas;
4. From VisionQuest Biomedical LLC, Albuquerque, New Mexico; the 4Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa;
5. the Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa; the 5Iowa City VA Health Care System, Iowa City, Iowa; and the 6Iowa City Center for the Prevention and Treatment of Visual Loss, Iowa City, Iowa.