184 The Management and Diseases of the Dog. 
Symptoms.—The iris is changed in colour, a deep reddish- 
‘brown tint, often extending beyond the edges of the cornea, 
may be plainly seen. The pupil becomes contracted, and 
to a great extent immovable to the stimulus of light. Ex- 
‘cess in the lachrymal secretion, pain and intolerance of 
light, and cold, are the accompanying symptoms. As the 
disease proceeds the eye becomes, from the engorged con- 
dition of the vessels, generally bloodshot. Extravasation 
of blood occasionally takes place, resulting in the formation 
-of pus, and the total destruction of vision. 
Treatment.—Here the local abstraction of blood is 
strongly indicated, together with absolute darkness. Warm 
fomentations, and free movement of the bowels. 
When the acute symptoms have passed away, the ad- 
‘ministration of tonics, and small doses of the iodide of 
potassium, and, if protracted, a seton in the poll, will ma- 
terially assist in restoring the eye to its natural condition. 
The light should be subdued so long as inflammatory 
symptoms are present, and gradually increased as these 
‘disappear. 
ENLARGEMENT OF THE HAW. 
The haw (membrana nictitans), or fold of membrane 
placed at the inner corner of the eye, is for the purpose of 
removing foreign bodies or irritants from the globe. Oc- 
ccasionally, from external violence, irritation or constitu- 
tional disease, it becomes enlarged, prominent, and obstruc- 
tive to vision and closure of the eyelids. In such cases the 
part presents a red and highly inflamed appearance, is ex- 
-ceedingly sensitive to touch, causes the animal considerable 
pain, and gives rise to profuse lachrymation. 
Treatment.—The primary treatment consists in scarifying 
and warm fomentations. Should the enlargement persist, 
it may be gradually reduced with the scalpel or scissors 
