The traveling on the way meets when has blows the wind, frequently can some thin inject in the eye, for example the ash point, the sand grains, the coal slack, the glass fragments, Gu Pi, the winged insect as well as the pencil sawdust and so on, these things are called the foreign matter, some inlaying on the white eyeball, are called conjunctiva the foreign matter, some inlays in with on is black different, is called the corneal foreign body.

The eye cornea (black eye is different) feels extremely sensitively, when the foreign matter enters the eye, causes the ache immediately, bursts into tears, opens the eyes not to enlarge ones vision. By now surely did not have to rub the eyes, because rubbed the eyes sometimes can abrade the cornea, even could inlay the foreign matter in the cornea is not easy to fall off, aggravates the damage, affected the vision. And further because the hand internal organs, lead intraocularly the bacterium can cause the inflammation.

When the foreign matter enters the eye, should gently close one's eyes a meeting, or with handles gently raises the upper eyelids, generally is attached to superficial the foreign matter to be possible voluntarily to discharge along with the tear. If the foreign matter cannot voluntarily discharge, still had rubs the pain, the foreign matter possibly inside the upper eyelids conjunctiva on, might cross the eyelid found the foreign matter, was good or the clean handkerchief with the wet cotton and kapok gently wipes off, also was allowed to use the clean water flushing, rubs the pain to vanish immediately. If crossed the eyelid not to still find the foreign matter, that foreign matter was possibly on the cornea, surely did not must from take, must arrive the hospital to treat. After sometimes the foreign matter discharges or takes out, the eye still the feeling rubbed the pain ill, resembled also has the foreign matter, this was because on the cornea had the wound, so long as inspected truly does not have the foreign matter, the antibiotics eye drops and the eye medicinal ointment, were very quick may restore normally.