Origin and sensitivity of the light peak in the intact cat eye

1. The light peak is a large light‐induced change in the DC potential across the eye (standing potential) that reaches its maximum in 5‐13 min in mammals. The light peak of the intact cat eye was studied in order to define its cellular origin and stimulus—response characteristics. Direct‐coupled recordings were made with a vitreal electrode and also with intraretinal and intracellular micro‐electrodes. Light peaks were generally evoked with 300 sec periods of diffuse white illumination.

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