Blinks, Negative Flashes, and Visual Responses

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Abstract
Evoked visual responses triggered by spontaneous blinking were recorded from the human subject. Their waveform resembled that of conventionally recorded responses. Two differences were noted: an early potential that was seen only with blink responses and the late negative potential was smaller than that seen with conventional recording. Off- and on-components were seen in the blink responses. These were compared with those produced by switching the stimulus off and on. The amplitudes of all of the components increased with stimulus intensity. Blinking may play a role in vision, per se, as well as acting to protect the cornea.