Cones survive rods in the light-damaged eye of the albino rat

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Science  10 Dec 1976:
Vol. 194, Issue 4270, pp. 1183-1185
DOI: 10.1126/science.996550


Exposure to constant light causes extensive rod photoreceptor damage but spares the photopic system in albino rats. The rod branch of the dark-adaptation curve shows considerable elevation in threshold; the cone branch is hardly affected. Longer exposure and chromatic adaptation suggest that there are three cone mechanisms with peaks near wavelengths of 450,520, and 560 nanometers.