Gislin Dagnelie, Ph.D., is an Associate Professor of Ophthalmology in the Johns Hopkins University School of Medicine and the associate director of the Lions Vision Research and Rehabilitation Center, a division of the Wilmer Eye Institute. His work over the last 20 years has been supported by grants from the National Institutes of Health, National Science Foundation, Foundation Fighting Blindness, and several companies developing ophthalmic devices and visual prosthetics. Dr. Dagnelie has been the Center Principal Investigator for clinical trials of the Optobionics Artificial Silicon Retina (2004-2007) and the Second Sight Argus™ 2 retinal implant (2007-present). Since the clinical introduction of the Argus II in early 2014, Dr. Dagnelie has been managing the retinal implant program at Johns Hopkins, and is the Center PI for several follow-up studies of Argus II use in patients’ daily lives. In addition, he studies signals in the retina of retinal prosthesis patients and spearheads an effort to convert standard personal computers into precise tools for visual function measurement in the community and at home. Dr. Dagnelie is a native of the Netherlands, where he earned a Ph.D. in medical physics at the University of Amsterdam. In 1986, he came to the Wilmer Eye Institute for research in retinitis pigmentosa, an interest he is pursuing to this day. He is an amateur vocalist and violinist, is married to Dr. Brenda Rapp, professor of cognitive science at Johns Hopkins University, and has a 23-year old son.