Objective To investigate the changes of homocysteic acid(HCA),cystatin C and high-sensitivity C-reactive protein(hs-CRP) in patients with type 2 diabetic retinopathy(DR) and determine if any correlations exist among these factors.Methods The group of patients with type 2 diabetes mellitus(DM) without DR included 45 individuals,the group of Type 2 DM with nonproliferative DR consisted of 42 patients and the group of type 2 DM with proliferative DR was composed of 46 patients.The control group comprised 40 he...