Effect of argon laser photocoagulation on the electrooculogram of diabetic retinopathy patients

ABSTRACT

This study includes 17 patients having proliferative or advanced background diabetic retinopathy. 27 eyes underwent panretinal photocoagulation. Electro-oculorgram was done both before and after the laser treatment. An average reduction of about 23.1 percent in the pretreatment value of Arden Ratio was found. Arden Ratio above 155 percent was found in 55.7 percent of patients before treatment, and after treatment it was found in only 17.5 percent of patients. The damage induced by the photocoagulation to the retinal pigment epithelium and the overlying photoreceptors is most probably the cause of this reduction in the value of Arden Ratio