14 



round body, usually black or browu ; it is a fold of the con- 

 junctiva and is designed to direct the tears toward the open- 

 ing, located in each eyelid near the internal angle, by which 

 the tears pass into the lachrymal ducts that carry the super- 

 fluous tears to the lachrymal sack. This tear sack is a little 

 reservoir which receives the tears from the ducts of the 

 upper and lower lids, and passes the tears into the lachrymal 

 canal. The lachrymal canal passes downward and slightly 

 inward, at first through a bony canal, and terminates on the 

 inner surface of the outer wing of the nostril; the opening 

 or orifice of this canal looks as if it were punched out of the 

 tissues and is sometimes mistaken for an ulcer. 



DISEASES OF THE EYELIDS. 



TuMOKS of various kinds are occasionally found on the 

 eyelid. The upper lid is a favorite place for warts — diseased, 

 excessive growths of the outer layers of the skin. The ex- 

 citing cause of warty growths is at present thought to be a 

 very minute plant or animal parasite. It is best to excise 

 them with the knife ; or, if small, to snip them off with the 

 scissors, being careful not to cut deeper into the eyelid than 

 the thickness of the skin. After the bleeding has partially 

 ceased and the blood has been wiped away with a clean, 

 moist sponge or cloth, the raw surface may be touched or 

 cauterized with lunar caustic or a small pledged of cotton 

 dipped in strong carbolic acid. Melanotic (black, pigmented) 

 tumors are occasionally found on the eyelids of white horses. 

 If they are small and are removed in the early stage of 

 growth, they are not so liable to return ; but if they involve 

 considerable tissue or are of long existence, they are very 

 liable to return after removal. All small tumors of the eye- 

 lids may be removed in a manner similar to that described 

 for warts. 



Pedunculated tumors may be ligated by tying a strong 



