1 Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan 2 Department of Ophthalmology, Sanno Hospital, Tokyo, Japan 3 Kobe Kanagawa Eye Clinic, Tokyo, Japan 4 Department of Ophthalmology, Japanese Red Cross Gifu Hospital, Gifu, Japan 5 Nagoya Eye Clinic, Aichi, Japan 6 Oka Eye Clinic, Fukuoka, Japan 7 Ray Eye Clinic, Hyogo, Japan