When any foreign body enters the eye, close it instantly, and keep it
still until you have an opportunity to ask the assistance of some one;
then have the upper lid folded over a pencil and the exposed surfaces
closely searched; if the body be invisible, catch the everted lid by
the lashes, and drawing it down over the lower lid, suddenly release
it, and it will resume its natural position. Unsuccessful in this
attempt, you may be pretty well assured that the object has become
lodged in the tissues, and will require the assistance of a skilled
operator to remove it.