Photoreceptor cell

A photoreceptor cell is a specialized nerve cell that is sensitive to certain wavelengths of light.

Photoreceptor Cell Media

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  Normalized human photoreceptor absorbances for different wavelengths of light

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  Illustration of the distribution of cone cells in the fovea of an individual with normal color vision (left), and a color blind (protanopic) retina. Note that the center of the fovea holds very few blue-sensitive cones.

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  Distribution of rods and cones along a line passing through the fovea and the blind spot of a human eye

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  The absorption of light leads to an isomeric change in the retinal molecule.