AIM:To explore the correlation between the degree of diabetic macular edema(DME) and the level of serum sialic acid in patients with type 2 diacetic.·METHODS:Sixty-five patients with type 2 diabetes were included in this study and another 54 cases were included as health control group.The concentration of serum sialic acid was tested by colorimetric methed.The degree of DME was detected by fundus fluorescein angiography(FFA).·RESULTS:In the 65 diabetes patients 22 cases had DME(level 1:10 cases,lebel 2:5 ca...