On the surface, the eye looks like a fairly simple organ. However, this 1 inch sphere is a very complex machine made up of many different parts. These parts work together and helps give us our sense of vision.
Simply stated, the eye works like a very elegant biological camera. Light from the outside world is focused by the combined effect of the cornea and the lens. In the normal eye, light is brought in to sharp focus exactly on the retina. The retina then works together with the optic nerve to transmit visual information to the brain.
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