DISEASES OF THE EYES. 277 



STRICTURE OF THE rACHRYMAL DUCT. 



This is due to the thickening of its lining mucous membrane, 

 from catarrh of the nose extending into the duet, or from the 

 inflammation of ghinds. The tears flow over the side of the face, 

 constituting what is termed watery eye. The common seat of 

 stricture of the lachrymal duct appears to be at the superior part, 

 and is best treated by syringing with cold water, from the puncta 

 lachrymalis downward, or it may be necessary to dilate it. Treat- 

 ment of this condition must be entrusted to the veterinary sur- 

 geon. 



ECTROPIUM, OR EVERSION OF THE EYELID. 



This is commonly seen in dogs as a result of distemper. The 

 conjunctiva should be scraped and the nitrate of silver applied. 

 AVhen this fails it becomes necessary to excise an elliptical shaped 

 portion of the conjunctival membrane, using the curved scissors 

 for the purpose; after which use fomentations and use the rem- 

 edy described for wounds of the eyelids. 



ENTROPIUM, OR INVERSION OF THE LID. 



This is exactly the opposite of ectropium, the eyelid being 

 doubled in instead of outward. 



Treatment. — Part of the eyelid skin must be removed, in 

 order to remove the surplus, so that when the wound heals the 

 lid will be retained in i^roper position. 



