Orbital and Periorbital Complications of Proton Beam Radiation Therapy for Intraocular Tumor Y.J. Choi, S. Kim, H.K. Choung, and Y.S. Yu; Department of Ophthalmology, Kangdong Sacred Heart Hospital, Hallym University Medical Center, Seoul, South Korea, Department of Radiation Oncology, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, South Korea, Department of Ophthalmology, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, South Korea, Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Korea, Seoul, South Korea, Department of Ophthalmology, Seoul National University Hospital, Seoul, Korea, Seoul, South Korea