AND HIS DISEASES. 169 



When tte cloudiness or opacity of the cornea is tardy in 

 being removed, the eye should be stimulated daily with the 

 following eoUyrium : — 



Nitrate of silver, 5 grains. 



Distilled water, 1 ounce. 



Apply by means of a feather or camel hair brush. 



SPECIFIC OE PEEIODIC OPTHALMIA , 



Is the most severe affection to which the horse's eye is 

 liable, and we are sorry to say it is not an nnfrequent disease 

 amongst horses in this country. The parts principally and 

 primarily involved are the internal structures of the eye, and 

 the changes which occur vary in degree to the severity of the 

 attack. 



Causes. — The great cause of this affection can be traced 

 to an hereditary predisposition, always ready to burst forth 

 when exposed to certain exciting causes, suph as injuries of 

 any kind, being kept in very dark and ill-ventilated stables, 

 and then suddenly exposed to the glare of a hot sun ; and, 

 like simple ' opthalmia, it may follow continued exposure to 

 cold. 



Symptoms. — Among the first symptoms is a watery dis- 

 charge from one or both eyes, and on being exposed to the 

 sun's light he exhibits a peculiar uneasiness, with a partial 

 closure of the affected eye. In this stage a common expres- 

 sion is, " that he has got a cold in the eye." As the disease 

 advances, the eyeHds become swollen, and if turned upwards, 

 the conjunctiva appears reddened and injected ; and alto- 

 gether the symptoms are very like those of simple opthalmia, 

 and often leads to the supposition that the eye has received 

 a blow or other injury. The above symptoms become 

 more and more aggravated, and the patient becomes affected 

 constitutionally, — the circulation is increased, the mouth hot. 



