The recording of Visual Evoked Potential alterations at the patients with diabetic retinopathy. It was performed the Visual Evoked Potential recordings at 24 patients with diabetic retinopathy in different stages of evolution, with or without complications. The type of Visual Evoked Potential recording was pattern reversal with vertical bars. We followed the diagram alterations in correlation with the evolution stages of diabetic retinopathy and the visual parameter alterations. In all cases we recorded alteration of the Visual Evoked Potential. In nonproliferative diabetic retinopathy was noticed the delay of P100 wave with inconstant presence of the N75 and N135 waves. In proliferative diabetic retinopathy and its complications the alterations of the tract were important. The gradual alteration of the Visual Evoked Potential tract at the patients with diabetic retinopathy represents a prognosis of the disease.