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The electrical stimulation of the retina by indwelling electrodes


, : The electrical stimulation of the retina by indwelling electrodes. Investigative Ophthalmology & Visual Science 16(3): 249-252

Chronically implanted intraocular electrodes were used to stimulate visual cortical responses to current passage through the retina. Electrical current threshold for the light-adapted cat retina lies in the region of 30 to 100 X 10(-6) amps. for the conditions used. Dark adaptation caused a large threshold increase. Retinal excitability also decreased when electrical stimuli were delivered more often than one per 5 seconds. Effective charge-density threshold was moderately greater than reported for frogs and humans.

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Accession: 006670160

PMID: 844981

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