274 THE STOCK owner's ADVISER. 



This disease is generally seen in dogs and occasionally in 

 horned cattle. In the dog it occurs from two causes — a growth 

 of a tumor and bulging of the cornea caused by distention of the 

 anterior chamber by increased secretion of its natural contents. 

 In the first form, there will appear a small ulcer excavation in 

 the center of the tumor; the ulcer has a tendency to eat its way 

 through the cornea, and destroy the eye by allowing the escape 

 of its contents. If an ulcer is present it should be touched with 

 a point of the nitrate of silver. Afterward the thickening may 

 be removed by excision, or by caustic. 



Staphyloma, due to dropsy of the eye, admits of but one 

 remedy, and that may prove to be only palliative. The cornea is 

 to be punctured to allow the escape of the contained fluids. 

 Ulcers of the eye are best treated with the nitrate of silver, 

 either in solution or in its solid form. 



LACERATION OF THE CORNEA. 



This may occur in various ways, causing the escape of aqueous 

 humor. If it is a clean cut, the chances are that the cornea will 

 heal and the aqueous humor be reproduced. But if the cornea is 

 badly lacerated or torn, inflammation Avill set in, and the aqueous 

 humor will not be reproduced. There usually remains a slight 

 cicatrix, which, as a rule, does not interfere with vision. 



WORM IN THE EYE. 



Two kinds of worms have been noticed inhabiting the eye — 

 the filaria oculi, and the strongylus equinus. They vary from 

 half an inch to about two inches in length. The parasites are 

 taken into the stomach along with the food or water, and reach 

 the eye through the circulation. After reaching the eye, the 

 parasite develops and grows very rapidly. The movement of the 

 worm in the eye sets up an irritation, which causes a flow of 

 tears. On examining the eye something like a thread may be 

 seen. The worm moves about quickly. If allowed to remain, 

 a loss of vision will result. 



