258 THEORY AND I^RACTICE 



erect and turn quickly at any noise. The animal steps high to 

 avoid stumbling. 



Treatment. — Treatment is only useful when the disease is 

 symptomatic of some removable cause, such for instance as con- 

 gested brain, an overloaded stomach or gravid womb. When re- 

 covery does not follow the termination of these conditions, ap- 

 ply a blister behind the ear and give dram doses of nux vomica 

 three times daily. 



DETACHMENT OF THE RETINA. 



This occurs in case of hemorrhage between the chorid and 

 the retina. It produces a loss of functional activity of the retina 

 and may run into amaurosis. The cause of this condition may 

 be a severe blow on the head, a fit of coughing, or rapid, ex- 

 cessive hemorrhage. It is common in people and horses and dogs 

 but is never seen in cattle. It frequently occurs in horses in con- 

 nection with castration, cuts from barbed wire fences, etc. This 

 afifection can sometimes be cured ; amaurosis seldom. 



In treating such cases give tincture of iron and nux vomica 

 internally. Inject a few drops of witch hazel (distilled extract) 

 into the eye three times a day. 



STAPHYLOMA. 



This consists of a bulging forward of the cornea at a given 

 point by the sacular yielding and distention of its coats. The 

 tumor may be transparent or opaque. The disease is common 

 in the human and dogs but rare in horses and cattle. In the 

 transparent form the tumor is bulging, distended and cyst-like; 

 but in the opaque the tumor is thick and is formed like a grape. 

 The bulging kind is more common and it grows larger than the 

 solid tumor. 



If the bulging kind is detected soon enough, puncture it and 

 liberate some of the aqueous humor. This may save the eye. 

 If the condition becomes chronic and a thickened mass is found 

 on the outside of the cornea, it must be removed. This operation 

 destroys the sight and the cornea cannot be replaced. A glass 



