1 Department of Ophthalmology, Hebei General Hospital, Shijiazhuang, Hebei, China; Graduate School, North China University of Science and Technology, Tangshan, Hebei, China.
2 Department of Ophthalmology, Hebei General Hospital, Shijiazhuang, Hebei, China.
3 Department of Surgery, Hebei General Hospital, Shijiazhuang, Hebei, China.
4 Department of Ophthalmology, Hebei General Hospital, Shijiazhuang, Hebei, China. Electronic address: [email protected].