Compare the human eye and photographic camera
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Lens
Both the camera and the human eye have a lens that focuses light into an inverted image. One major difference between the two lenses, though, is that while a cameralens moves closer or farther from an object in order to bring it into focus, the lens of the human eye stay stationary. To bring an object into focus, muscles in the eye respond to instructions from the brain and change the shape of the lens,
Retina (Film or Sensor)
Additionally, the eye's retina is like a camera's film or sensor onto which light is cast. In the eye, light passes through the lens and hits the retina, where rods and cones help transform the received image into electric impulses that are sent along the optic nerve to the brain. While both the retina and a camera's film or sensor are all highly sensitive to light, the eye is much more so, and performs much better in the dark -- even without a flash.
Eye uses live cells to detect light while the camera uses a diaphragm to detect light and capture images.
Eyes have blind spots while cameras do not.
Both the camera and the human eye have a lens that focuses light into an inverted image. One major difference between the two lenses, though, is that while a cameralens moves closer or farther from an object in order to bring it into focus, the lens of the human eye stay stationary. To bring an object into focus, muscles in the eye respond to instructions from the brain and change the shape of the lens,
Retina (Film or Sensor)
Additionally, the eye's retina is like a camera's film or sensor onto which light is cast. In the eye, light passes through the lens and hits the retina, where rods and cones help transform the received image into electric impulses that are sent along the optic nerve to the brain. While both the retina and a camera's film or sensor are all highly sensitive to light, the eye is much more so, and performs much better in the dark -- even without a flash.
Eye uses live cells to detect light while the camera uses a diaphragm to detect light and capture images.
Eyes have blind spots while cameras do not.
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