Pain is usually mild, or there is no pain. Itching, redness, and drainage may be seen. Corneal abrasions and corneal ulcerations are also common causes of eye pain. The cornea is the transparent surface of the eye. Abrasions occur from scratches to the surface of the cornea such as a foreign body in the eye or overuse of contact lenses.
Ulcerations occur from infections or abrasions.
Foreign bodies, usually located on the cornea or in the conjunctiva, are objects or material that give you the sensation that something is in your eye. Foreign bodies produce eye pain similar to that of corneal abrasions. Chemical and flash burns are significant causes of eye pain. Chemical burns come from eye exposure to acid or alkali substances. Flash burns occur from intense light sources such as arc welding or tanning booths when improper eye protection is worn.