Tears

(tērz.) (Physiol.) The limpid fluid secreted by glands adjoining the eye, and increased by emotions of the mind, but more especially by grief. This fluid is also called forth by any injury done to the eye. It consists of about one per cent. solid matter; composed of common salt, with traces of phosphate of soda, and albumen. This fluid serves to moisten the cornea, and preserve its transparency, as well as to remove any dust or other substance that enters the eye. The lachrymal glands are the organs which secrete this liquid; one of them is situated in the external canthus of each orbit, and emits six or seven excretory ducts, that open on the internal surface of the upper eyelid, and pour forth the tears. [s. 880]