The composition of the eye and its function

explanation of the composition of the eye and its function is as follows:

Is the outside of the eyelid which protects the eyes and wetting the outside of the eyeball. Every time you blink, the liquid spreads across the front of your eyes.
Sclera is a powerful network, which covers the white outer eyeballs. Sclera protect your eyes.
Iris is a muscle. Iris regulates the amount of light entering the eye. Iris is also a section that gives color to the eye. If you say that someone's eyes are blue or brown, you're showing the colors of the iris.
The pupil is a hole in the middle of the iris. Light enters the eye through the pupil. When the amount of light entering the eye will change, large iris and pupil also changed. Pupil becomes larger in remangremang light and smaller in bright light.
The cornea protects the eye. Opaque cornea, so that light can enter the pupil. The cornea also helps bring light rays to bend a beam of light when the light enters the eye.
The lens is a clear part of the eye that changes shape when you look at objects with different distances. Muscles attached to the lens lens. Muscles pull the lens and change the shape of the lens. This process helps to bring light rays from objects that are close or far away.
The retina is the part of the eye is located at the rear. The retina is composed of nerve cells that are sensitive to light. In the retina there are stem cells and cone cells. Stem cells respond to dim light. Cone cells respond to bright light and color. Retinal function is often likened to the film in the camera. Vitreous fluid is liquid gelatinous liquid
that meets the eye cavity. This fluid pushing parts of the eye outwards so that the eye shape remains round.
good summary article about the composition of the material and useful function for all blog visitors.

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