|MadSci Network: General Biology|
Dear Imad, Human eyes are not fundamentally different than the eyes of other vertebrate animals, simply because humans are vertebrate animals. All vertebrates have two main types of photoreceptors in their retinas: rod cells and cone cells. The differences in the light and color sensitivities of the eyes of different animals are partly due to the differences in the numbers of these photoreceptors in their eyes. Aydin Orstan
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