Arun Singh, MD, is Director of the Cole Eye Institute at Cleveland Clinic in the Department of Ophthalmic Oncology. He is also the Series Editor for Springer”s Essentials in Ophthalmology series and was the former Editor for The British Journal of Ophthalmology and is the current Editor of Ocular Oncology and Pathology.  Bertil Damato, MD, Ph D,  is Professor of Ophthalmology and Radiation Oncology and Director of the Ocular Oncology Service at the University of California, San Francisco. Until 2013, he was Consultant Ophthalmologist at the Royal Liverpool University Hospital, where he was Director of the Ocular Oncology Service, which he established in 1993. Dr. Damato has published more than 200 peer-reviewed articles, 68 reviews, 75 book chapters and 6 books, one as single author.