Corneal abrasions are a small scratch on the cornea, the clear window at the front of the eye. They are generally a result of trauma (injury) to the surface of the eye. Injuries can also be caused by contact lens insertion and removal.
Abrasions are very painful as many fine nerves supply the cornea. The pain gets better as your eye heals, but this can take between 24 and 48 hours. If the abrasion involves the central part of your cornea, your vision could also be temporarily affected.
Treatment involves a thorough examination of your eye and lids, to check for any trapped foreign material and ensure there is no serious eye injury. This is followed by drops or ointment and occasionally an eye pad. You may take ordinary pain killers, such as paracetamol, to help with the pain.