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The cornea is a clear membrane made of collagen that covers the front of your eye. It protects the inside of the eye and focuses light that passed through it into the eye. If the cornea gets scratched, it can cause a corneal abrasion, and if it gets infected by a virus or bacteria, it can cause keratitis.
Cornea, Lens, and Iris. The iris is the colored part of the eye. A circular muscle in the iris controls the amount of light entering the eye through the pupil, the black area in the center of the iris.The cornea is the outer clear, round structure that covers the iris and the pupil.The cornea directs light rays into the eye and helps focus them on the light-sensitive retina at the back of the eye, providing sharp, clear vision. The lens is located behind the iris and is normally clear.he cornea is the outer clear, round structure that covers the iris and the pupil. The cornea directs light rays into the eye and helps focus them on the light-sensitive retina at the back of the eye, providing sharp, clear vision. The lens is located behind the iris and is normally clear.