The Vision Impairment and Intracranial Pressure (VIIP) Syndrome: What Can We Learn from the Astronauts. Gianmarco Vizzeri, M.D. is Associate Professor of Ophthalmology at the Department of Ophthalmology and Visual Sciences, University of Texas Medical Branch. He is also Medical Director of the Ophthalmology Clinical Research Center and serves as Vice Chair for Clinical Services. He is the holder of the Edwin and Rebecca Gale Distinguished Chair in Ophthalmology.