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 ol 

 removing foreign bodies or irritants from the globe. Oc- 

 casionally, 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 th( 

 part presents a red and highly inflamed appearance, is ex 

 ceedingly sensitive to touch, causes the animal considerabl( 

 pain, and gives rise to profuse lachrymation. 



Treatment. — The primary treatment consists in scarifyini 

 and warm fomentations. Should the enlargement persist 

 it may be gradually reduced with the scalpel or scissor 



