Quote:
Originally Posted by ceptimus
If an eye had to capture all the light to form an image, then we'd be in trouble when two or more people were looking at the same thing. Presumably the first eye to glance at an object would hoover up all the light from that thing, so it would be rendered invisible to the other potential observers. In fact this would happen even with the two eyes of a single person, so it would be a race between the left eye and the right eye as to which one managed to see the thing being looked at.
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Perhaps the 2 eyes would have evolved to cooperate and each eye collected half of the image, this would explain how binocular fision works and allows us to estimate distances to diatant objects. Possibly like an optical range finder where the image is split in half and when the two halfs are lined up you can read the distance to the object on the dial, except that the 'dial' would be a kind of automatic function of the brain.