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Dear Sanford:
Yes and no. In some ways, your eye is very much like a camera. But your eye also does a bunch of
things that a camera can't do. A camera can't "think", but that's exactly what your eye does when
you see something. How you "see" a visual puzzle or optical illusion, for example, is the result of
your eye processing information. The part of your eye called a retina is connected to your brain
and, in effect, part of it.
It's how your eye gets an image that is like a camera. First, a camera and the eye both
control the amount of light that enters them by enlarging or narrowing the hole through which light
enters. Both have lenses that can focus the image to be seen. Both, also register the image on a
light-sensitive surface -- the retina, in the case of the eye, and film in the case of the camera.
Cool, huh? How do you think people came up with the idea for cameras in the first place? Why they
copied what nature had already created -- the human eye!
Signed,
Wendell
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