Dr. Sadun earned a medical degree and a doctorate in neuroanatomy from Albert Einstein College of Medicine. He completed a residency and chief residency at the Massachusetts Eye & Ear Infirmary, Harvard Medical School. He completed a combined clinical fellowship in neuro-ophthalmology at Boston University School of Medicine and Harvard Medical School. Dr. Sadun and a team of researchers at the Doheny Eye Institute pioneered research in optic nerve dysfunction in patients with Alzheimer's disease. His research and clinical expertise in diseases of the optic nerve made him the choice to lead a team of investigators that determined the metabolic cause of an epidemic of optic neuropathy in Cuba, 1993-1994. Dr. Sadun is a Professor of Ophthalmology and Neurological Surgery at the USC Keck School of Medicine.