Department of Ophthalmology;
Affiliated Hospital of Beihua University;
Jilin;
Jilin Province;
China;
Department of Endocrinology;
Affiliated Hospital of Beihua University;
Jilin;
Jilin Province;
China;
diabetes; diabetic retinopathy; epithelial cells; macula; progenitor cells; retina; stem cells; visual analysis;