CHAPTER XII. 



CISEASES OF THE EYE. 



OPHTHALMIA, PROTRUSION OF THE 



CATARACT, EYE-BALL, 



AMAUROSIS, EXTIRPATION OF THE 



IRITIS, EYE, 



ENLARGEMENT OF THE HAIRY TUMOUR ON 



HAW, THE CORNEA. 

 HYDROPHTHALMIA. 



OPHTHALMIA. 



The dog, though not liable to many of the diseases affect- 

 ing the visual organs of the human being, is nevertheless 

 frequently the subject of some of the more prominent ones. 

 Ophthalmia, or inflammation of the mucous membrane 

 lining the eyelids and covering the ball, is very commonly 

 met with, especially in sporting dogs. 



Causes. — External violence, as blows, bites, pricks from 

 thorns, cat-scratches ; or irritation from the presence of 

 foreign bodies, as dust, grit, inverted lashes, accumulated 

 pus, soap-suds, etc. ; irritating vapours, particularly stable 

 effluvia, or that of undrained and neglected kennels ; damp 

 and cold. 



Ophthalmia may be sympathetic with other diseases, as 

 distemper and disorders of the digestive organs. 



Symptoms. — Simple ophthalmia commences with in- 

 tolerance of light, deflux of tears, and repeated, closing of 

 the eyelids. If the latter are separated, the conjunctival 

 l8o 



