Electro-oculography as a functional test in pathological conditions of the fundus. I. First results.

THE modifications of the standing potential in pathological fundus conditions are practically unknown, although electro-oculography (EOG) is a technically simple and clinically very efficient method of obtaining an indirect estimate of its value. Although the EOG is now widely used in order to study ocular motility, it is generally not considered as a functional test: only Riggs (1954) has reported diminished deflections in a case of pigmentary degeneration, and we ourselves have studied the EOG in a few cases of congenital retinal abnormality, such as Oguchi's disease (Frangois and Verriest, 1954) and total colour blindness (Fran9ois, Verriest, and De Rouck, 1955b). The present paper deals with the technique, physiological values, and results obtained in a few cases of the more typical diseases of the choroid and the retina.