1. Department of Ophthalmology, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, P.R. China
2. Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, P.R. China
3. Department of Optometry and Visual Science, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, P.R. China