The present paper deals with the electroretinographic findings in 30 patients with inflammatory or postinflammatory disturbances of the fundus. The alterations of the scotopic ERG depend on the localization and extent of the disease. The individual components of the ERG are affected differently. It is evident that in a high percentage of patients with unilateral disease the ERG of the fellow eye was affected as well. This might be due to an immunologic reaction. It is pointed out that further investigations are required in order to resolve the problems involved.