Heavy metals affect rod, but not cone, photoreceptors

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Science  05 Oct 1979:
Vol. 206, Issue 4414, pp. 78-80
DOI: 10.1126/science.314667


Low concentrations of lead, mercury, or cadmium depress the amplitude of the rod receptor potential in the perfused bullfrog retina. Responses from the cones were not affected. The data implicate the rods as a lesion site in animals exhibiting scotopic vision deficits as a result of heavy metal poisoning.