With color Doppler flow imaging(CDFI), blood flow parameters of central retinal artery (CRA)and central retinal vein (CRV) were assessed for 105 normal persons and 42 diabetic retinopathy patients (DRP).

• 利用彩色多普勒测定105例正常人与42例糖尿病性视网膜病变（DRP）视网膜中央动、静脉（CRA、CRV）血流参数，计算其比值来研究CRA，CRV血流动力学相互关系。