injuries and poisoning
Corneal Abrasions and Corneal Foreign Bodies
Symptoms
Corneal abrasions and foreign bodies usually cause pain, tearing, and a feeling that there is something in the eye. They may also cause redness (due to dilated blood vessels on the surface of the eye) or, occasionally, swelling of the eye and eyelid. Vision may become blurred. Light may cause the muscle that constricts the pupil to undergo a painful spasm. Injuries that penetrate the eye ( Intraocular Foreign Bodies ) may cause similar symptoms. If a foreign object penetrates the inside of the eye, fluid may leak out. 