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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. The cornea and sclera form the outer fibrous layer of the eye. The cornea is a clear transparent tissue, which is located forward of the eyeball. Light rays pass through this limpid tissue, and on through the crystalline lens to reach the retina.The cornea is convex in shape and for this reason directs or bends light rays so that they can be focused on the retina.clera. The eye consists of three layers of tissue which make up the wall of the eye. The sclera is the outermost layer of tissue, also called the white of the eye. This layer is a very stable fibrous membrane that continues to retain the shape of the eye and provides protection.