The Human Eye

The eye is a rather small part of the body that makes up seventy percent of the humans total sensory ability. That is why we chose to describe the eye. Each part of the eye works together as a whole. Within and outside of the eye there are many working parts functioning around the clock.. The cornea is a very important part of the eye, but you can hardly see it because it's made of clear tissue. Like glass, the cornea gives your eye a window in which to view the world. The a cornea is a transparent tissue covering the front of the eye. The cornea covers both the pupil and he iris eye, and it is partially responsible to focus light. The cornea is part of the external structure of the eyeball. The external layer of the eyeball is formed by the cornea, and the sclera. The cornea is a dome-shaped structure. The cornea does not have any blood vessels that is why it appears clear. The cornea does have nerves. The cornea is the first and most powerful lens in the eye's optical system. The cornea is the first part of the eye to focus. When a ray of light hits the eye, the cornea is the first structure the light encounters. Then the light rays travel through your eye through a hole called the pupil. As light rays from an object enter your eye, they are bent inward by the cornea and lens. Light rays are focused through the transparent cornea and lens. Light rays focused by the cornea and lens produce an image on the retina that is upside down. The cornea is made up of five layers: the epithelium, Bowman’s layer, the stroma, Descement’s membrane, and the endothelium. The cornea obtains oxygen through absorption from the tear film layer, and from the aqueous humor. The tears that flow over the cornea help to keep it nourished and moist. {draw:frame} The anterior chamber lies between the iris and the back surface of the cornea. There are three chambers of fluid in the eye. The anterior chamber, which is between the cornea and iris. The posterior