20 



continue to irritate other parts of the eye, it may be removed. 

 Occasionally tumors appear on the haw or eye-washer; if 

 small and harmless they may be left undisturbed or clipped 

 off with the shears; but if large and harmful, the entire haw 

 (ii necessary) may be removed. In cutting away the torn 

 haw, or the tumor and haw, the animal should be securely 

 and safely confined (by casting or otherwise) and a few drops 

 of a ten per cent, solution of cocaine may be put into the 

 eye; after waiting a few minutes for the cocaine to take effect, 

 the haw or tumor may be grasped with small forceps and 

 completely excised with the shears; during the next few days 

 cleanse the eye, two times per day, with warm water, and a 

 one per cent, solution of carbolic acid. After repeated or 

 severe attacks of inflammation of the conjunctiva, or repeated 

 attacks of moonblindness, the haw remains more prominent 

 and farther projected over the eyeball than normal. In 

 tetanus, or lock-jaw, in horses, the haws are partially or 

 completely extended over the eyeball — especially on exposure 

 to strong light or when the head is elevated. 



DISEASES OF THE TEAE APPARATUS. 



In all cases where the tears are running down over the 

 side of the cheek and there is no swellinof or redness of the 

 lids in their normal position, it is wise to examine carefully 

 the lachrymal or tear apparatus. Most frequently tlie lach- 

 rymal canal is obstructed at its opening into the nostril; 

 this may be relieved, as a rule, by removing the dirt and pus- 

 like matter which clogs the opening. 



Sometimes the canal is obstructed in its superior part near 

 the tear sack; then it is best to inject by means of a small 

 syringe, carbolized water or a two per cent, solution of bo- 

 racic acid, into the canal at its lower or nasal opening. If 

 the tear canal, tear sack and tear ducts are open or pervious, 

 the water will pass out at the tear points near the inner angle 



