Hee Kyung Yang1, Jae Hyoung Kim2, Jeong-Min Hwang3. 1. Department of Ophthalmology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-dong, Bundang-gu, Seongnam, Gyeonggi-do, 463-707, South Korea. 2. Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-dong, Bundang-gu, Seongnam, Gyeonggi-do, 463-707, South Korea. jaehkim@snubh.org. 3. Department of Ophthalmology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-dong, Bundang-gu, Seongnam, Gyeonggi-do, 463-707, South Korea. hjm@snubh.org.