Lei Yao1, Dan-Dan Zhou2, Cheng-Wei Lu3. 1. Department of Ophthalmology, The First Hospital of Jilin University, Changchun City, Jilin Province, China. 2. Department of Radiology, The First Hospital of Jilin University, Changchun City, Jilin Province, China. 3. Department of Ophthalmology, The First Hospital of Jilin University, Changchun City, Jilin Province, China. Electronic address: lcwchina800@sina.com.