224 Hounds 



crystalline lens, its capsular investment, or a com- 

 bination of both in the diseased activity. 



Cataract may be partial or it may be complete, 

 therefore the visional defect is proportionate to the 

 area of the lens involved. Aged dogs are those 

 most subject to this trouble, this being known as 

 senile cataract, which, like all other forms of cataract 

 affecting the dog, is incurable. It is not difficult to 

 recognize advanced forms of cataract, but in the 

 earliest stages of the disease it is very troublesome 

 to do so. In partial cataract the specks are ex- 

 tremely minute to begin with, and from these 

 radiating lines gradually extend over the surface of 

 the lens, finally becoming confused, until the whole 

 structure of the lens is more or less involved. 



Glaucoma and Amaurosis 



This disease consists of a bulging of the eyeball, 

 due to an excessive secretion of aqueous and Hqueous 

 humours of the eye, causing the dog to have short 

 sight. One or both eyes may be affected, but it is a 

 somewhat uncommon ocular disease. 



Amaurosis occasionally occurs in hounds, being 

 more popularly known by the title of glass eye, 

 owing to the glassy appearance assumed by the 

 organ. So far as appearances go, the eye is normal, 

 yet the animal is totally blind. The optic nerve 

 seems to be in a paralytic state and incapable of 



