1. School of Computer Science and Engineering, Central South University, Changsha, Hunan 410083, China
2. Hunan Engineering Research Center of Machine Vision and Intelligent Medicine, Central South University, Changsha 410083, China
3. Department of Ophthalmology, Second Xiangya Hospital, Central South University, Changsha, Hunan 410083, China
4. Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410083, China