Electrophysiological Studies before and after Argon-Laser Photocoagulation in Diabetic Retinopathy

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Abstract
Eyes (50) with diabetic retinopathy were studied before and after treatment with Ar laser coagulation. After treatment, decreases of the L/D ratios of the EOG [electro-oculogram] and of the amplitudes of all ERG [electroretinogram] components were found. The scotopic b waves were more involved than the photopic b waves. The peak times were hardly modified. The dark-adaptation curves were not modified. In the pretreatment findings the EOG were involved before the ERG. The decreases of the L/D ratios started when avascular and ischemic zones were seen on fluorescein angiography.

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