1. From the Department of Ophthalmology, the 2Department of Ophthalmology, Seoul National University Bundang Hospital, Seongnam, Korea;
2. the Department of Ophthalmology, Kim's Eye Hospital, Konyang University College of Medicine, Seoul, Korea.
3. the School of Electrical Engineering, and
4. the Interdisciplinary Program of Medical and Biological Engineering Major, Seoul National University, Seoul, Korea;