1. Department of Ophthalmology and Clinical Centre of Optometry, Peking University People's Hospital, Beijing, China,
2. Eye Disease and Optometry Institute, Peking University People's Hospital, Beijing, China,
3. Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases, Beijing, China,
4. College of Optometry, Peking University Health Science Center, Beijing, China,
5. Department of Ophthalmology, The General Hospital of Jixi Mining, Heilongjiang, China,