CHAPTER XII. 
DISEASES 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, sues from 
thorns, cat-scratches ; or irritation from the presence of 
foreign bodies, as duce 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. Ifthe latter are separated, the conjunctival 
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