1. Electrical and Computer Engineering and
2. Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, Iowa; the 3VA Center for the Prevention and Treatment of Visual Loss, Department of Veterans Affairs, Iowa City, Iowa; and the
3. Department of Neuro-Ophthalmology, Roosevelt Hospital and New York Eye and Ear Infirmary, New York, New York.
4. Electrical and Computer Engineering and 3VA Center for the Prevention and Treatment of Visual Loss, Department of Veterans Affairs, Iowa City, Iowa; and the