1. Institute for the Visually Impaired and associate professor, Pennsylvania College of Optometry, 1200 West Godfrey Avenue, Philadelphia, PA 19141
2. Department of Veterans Affairs, Rehabilitation Research & Development Center, 1670 Clairmont Road, Decatur, GA 30033 and associate professor, Pennsylvania College of Optometry
3. Maryland School for the Blind, 3501 Taylor Avenue, Baltimore, MD 21236 and assistant professor, Pennsylvania College of Optometry.