The visual prognosis may be predicted by the response of electroretinography.So, electroretinography wilt be a useful tool in the study of diabetic retinopathy.

• 网膜电图之反应在糖尿病性网膜症之初期就会有律动小波之变化，且可预测其视力之预后状况，故为一有利之研究工具。