[Corneal response to 'off' in the intact rabbit eye]. / Etude de la reponse 'off' corneenne dans l'oeil intact du lapin

The corneal electrical responses of the retina to light OFF are described in this report. The results reveal that high intensities of stimulation evoke an OFF response containing a positive wave. Since this wave was resistant to Sodium aspartate it is concluded that it arises from the receptor level. Negative wave are of double origin a) a negative potential evoked with low light intensities which is resistant to Sodium aspartate b) a second negative wave which is sensitive to the latter drug and thus arises from the internal layers of the retina. It is concluded that, because of the absence of a prominent b wave, the OFF responses permit a more sensitive evaluation of retinal electrophysiology.