The human eye has been called the most complex organ in our body. It's amazing that something so small can have so many working parts. But when you consider how difficult the task of providing vision really is, perhaps it's no wonder after all.
The human eye is like a camera. Light comes in through the cornea, a clear cover that is like the glass of a camera's aperture. The pupil, an opening that opens and closes a little like a camera shutter, controls the amount of light coming in.
Some carry fluids (such as tears and blood) to lubricate or nourish the eye.
Others are muscles that allow the eye to move.
Some parts protect the eye from injury (such as the lids and the epithelium of the cornea).
And some are messengers, sending sensory information to the brain (such as the pain-sensing nerves in the cornea and the optic nerve behind the retina.
As a conscious sense organ the eye allows vision. Rod and cone cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth. The human eye can distinguish about 16 million colors.
Human eye is divided in two main part front part is called cornea and back part is called sclera attached with cornea. Inner side is aqueous humor. Lens and muscles are present.
Human eye vision is determined by brain area near occipital lobe.
Eye is protected by anti bacterial material fluished over the cornea,eye brows, and eye lids.