1.About 80 % of what we perceive comes through the eyes. Our memories are made 80 % by images. The eye comes with information about the depth, distance, shape, color and movement of the objects.2.The human eye is one of nature's wonders and functions like a photo camera. Only that is much more complex.
3. Human eye can detect 10 million color hues, but cannot see ultraviolet or infrared light. Insects can see the ultraviolet light.
4. The human eye sees basically three colors: red, green and blue. These are basic colors. The white is a combination of the three, the black is their lack. Yellow, purple or mauve form through the combination of two basic colors; these are called secondary colors.
5. The fore eyeball and the inner eyelids are covered by a transparent layer called conjunctive. While blinking, the conjunctive and the tears (produced by the Harder glands in the inner corner of the eye) moisturize and clean of dirt and dust the cornea.
6. Most cones are agglomerated in a region of the retina called macula lutea ("yellow spot"). That's why to clearly see a thing, we have to move the eyes, so that the projection is formed on macula lutea. Close to macula lutea, there is a blind spot where the optic nerve goes out of the eye.
7. Eyes are protected in bony eyesockets, sheathed with a fatty tissue, so that usually, the socket is more harmed that the proper eye.
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