1. From the Massachusetts Eye and Ear Infirmary and the Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; the
2. Department of Chemical Engineering, University of Alabama, Huntsville, Alabama; and
3. From the Massachusetts Eye and Ear Infirmary and the Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; the3The Center for Innovative Visual Rehabilitation, VA Medical Center, Boston, Massachusetts.