Relationship Between Syndrome Differentiation of Diabetic Retinopathy and Pattern of Visual Evoked Potential / 广州中医药大学学报

ABSTRACT

Objective To explore the relationship between syndrome differentiation of diabetic retinopathy (DR) and pattern of visual evoked potential (P-VEP).Methods One hundred and eighty-six eyes from 104 cases of DR were allocated to three groups according to TCM syndrome:qi-yin deficiency (Group A),qi stagnation and blood stasis (Group B) and yin-yang deficiency (Group C).P-VEP induced by various space frequency (0.388?Hz,1.55?Hz) and pictures of various colors (black/white,red/magenta,blue/green) was observed in the three groups and compared with that in the normal control group (Group D).Results One hundred and three eyes in Group A mainly manifested as simple DR,47 eyes in Group B and 36 eyes in Group C mainly manifested as proliferative DR.The latency of P 100 was prolonged and the amplitude was decreassed in all groups of DR,but the latency of P 100 was much prolonged in Group B,the amplitude was much decreased in Group C and the changes were less in Group A.Conclusion P-VEP varies in different TCM syndrome types of DR,and determination of P-VEP under various stimulating conditions may serve as an index of syndrome differentiation of DR.