1. Department of Ophthalmology Graduate School of Medicine University of the Ryukyus Okinawa Japan
2. Department of Ophthalmology Tajimi Iwase Eye Clinic Gifu Tajimi Japan
3. Department of Ophthalmology Higashi‐Nakano Eye Clinic Tokyo Japan
4. Department of Ophthalmology University of Tokyo Graduate School of Medicine Tokyo Japan
5. Kanto General Hospital of The Mutual Aid Association of Public School Teachers Tokyo Japan