1. Optometry Center, Shaanxi Eye Hospital, Xi’an People’s Hospital (Xi’an Fourth Hospital), Affiliated Guangren Hospital, School of Medicine, Xi’an Jiaotong University, Xi’an, Shaanxi Province, China
2. Department of Ophthalmology, The First People’s Hospital of Chenzhou, Chenzhou, Hunan Province, China
3. Department of Ophthalmology, Xi’an Children’s Hospital, Xi’an, Shaanxi Province, China