The cornea is the clear covering of the front of the eye. It works with the lens of the eye to focus images on the retina. Injuries to the cornea are common. Superficial (surface) corneal injuries, called corneal abrasions, may be caused by foreign bodies (such as sand or dust), overuse of contact lenses, or exposure to ultraviolet radiation. Risk factors include working in a dusty environment, prolonged exposure to the sun or artificial ultraviolet light sources, and overuse of contact lenses or ill-fitting contact lenses. Penetrating (deep) corneal injuries may occur with major trauma. High speed particles, such as chips from hammering metal on metal, are particularly dangerous. | 
Cornea Diseases
