Eyes are like cameras in the same way that brains are like computers; that is to say, they are completely dissimilar things. It may be useful sometimes to draw rough analogies between them, but it can be misleading. For example, in the center of your vision, all the time, there is a blind spot about the size of a lemon, one for each eye (due to the optic nerve at the back of the retina). The brain seamlessly fills in this blind spot so you never notice it - eyes and brains work together to interpret the visual environment.

Back when I was learning photography in the pre-digital age, it seemed to be generally held that the most commonly used lens (in the 35mm format) for photojournalism was 35mm as it came closest to approximating the human field of view, but for portraiture it was 85mm as it was the best approximation of our perception of perspective.

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