1. From the Department of Ophthalmology, Ehime University School of Medicine, Ehime, Japan;
2. From the Department of Ophthalmology, Ehime University School of Medicine, Ehime, Japan; 2Department of Ophthalmology, Takanoko Hospital, Ehime, Japan;
3. From the Department of Ophthalmology, Ehime University School of Medicine, Ehime, Japan; 3Department of Ophthalmology, Red Cross Hospital in Matsuyama, Ehime, Japan; and
4. Department of Information Engineering, University of Padua, Padua, Italy.