1. Department of Ocular Examination, Chifeng Chaoju Eye Hospital, Chifeng, Inner Mongolia, China
2. Department of Ocular Examination, Zhangjiakou Chaoju Eye Hospital, Zhangjiakou, Hebei, China
3. Department of Cataract, Baotou Chaoju Eye Hospital, Baotou, Inner Mongolia, China
4. International Education School, China Medical University, Shenyang, Liaoning, China
5. Department of Science and Education, Inner Mongolia Chaoju Eye Hospital, Hohhot, Inner Mongolia, China
6. Department of Ocular Plastic Surgery, Chifeng Chaoju Eye Hospital, Chifeng, Inner Mongolia, China.