Department of Ophthalmology, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai General Hospital, Shanghai Engineering Center for Visual Science and Photo Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Ophthalmology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China. Department of Ophthalmology, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai General Hospital, Shanghai Engineering Center for Visual Science and Photo Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, China. tracy_chen1990@hotmail.com. Department of Ophthalmology, Shanghai Eye Diseases Prevention and Treatment Center/ Shanghai Eye Hospital , Shanghai, 200080, China. tracy_chen1990@hotmail.com.