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.