DISEASES OF THE HOG. J57 



CHAPTER XVI. 

 DISEASES OF THE EYEBALL. 



The eye of the pig does not seem to be subject to 

 many diseases, but I have no doubt but that cases 

 occur which are not noticed; I shall therefore only 

 mention those I have met with. 



Conjunctivitis: Simple ophthalmia results 

 from injuries, and especially from foreign matters 

 entering the eye. Exposure to cold, heat and acrid 

 vapors, it is also the result of other diseases. When 

 injuries and foreign matters are the cause one eye 

 only is usually affected. 



Symptoms: There will be a profusion of tears 

 trickling down the cheek or cheeks, there will be a 

 thickening more or less of the eyelids and a red- 

 ness of their lining membrane; this also may be 

 thickened, which nearly closes the eye. An exam- 

 ination of the eye must be made, the lids being 

 separated by the finger and thumb and each lid in- 

 verted in turn. If the eye has been injured, for a 

 day or two there will usually be a white scum over 

 the corner, which usually disappears when the in- 

 flammation is reduced. 



Treatment: If there is any foreign substance in 

 the eve have it removed. This is not easily done as 



