[1] Nihon Univ, Dept Ophthalmol, Dept Visual Sci, Sch Med,Itabashi Ku, Tokyo, Japan
[2] Yokohama City Univ, Dept Ophthalmol, Sch Med, Yokohama, Kanagawa, Japan
[3] Yokohama Minami Kyosai Hosp, Dept Ophthalmol, Kanazawa Ku, Mutsuurahigashi 1-21-1, Yokohama, Kanagawa 2360037, Japan