DISEASES OF DOMESTIC ANIilALS. 67 



This growth makes its appearance in the posterior part of the eye. It 

 becomes larger and involves the entire eye and surrounding structures. 

 It may grow and hang down over the cheek, and give the animal a very 

 unsightly appearance. It may produce caries of the bones near the eye. 



Treatment. — You may effect a cure in first stages. If the eye ball is 

 destroyed, remove the fungus and the eye-ball, which may bs attended 

 with success. But in other cases it will grow again quickly. There will 

 be hemorrhage, which can be controlled by styptics, and it is not a bad 

 practice to touch with actual cautery ; then use styptics, astringents, etc. 

 If this is removed in the early stage it may not be reproduced, and if 

 reproduced it may not be for some time. It occurs in cattle, and the 

 same treatment is to be used. lujury to the cornea might excite it. 

 There is a bulging of the cornea, about the size of the end of a finger. 

 It is very vascular ; when cut into, it bleeds readily. As well as local, 

 give constitutional treatment. After cutting it out, you might give a 

 few doses of medicine, tonics, etc. 



Filaria Ocnli, Strongylus Eqniuiis. — There is scarcely any tissue of 

 the body exempt from parasites. They are found in the liver, testicle, 

 brain, bronchial tubes, kidneys, lungs, muscles, the eyes, etc. It is 

 noticed in the eye, in Canada and the United States, but it is very com- 

 mon in India. It has never been noticed in England. This parasite is 

 most likely to be found where the animals are grazing on wet land, or in 

 wet weather. They get into the eye by means of the circulation. The 

 ovum is taken in by means of the food or drink, gets into the stomach 

 and is carried through the circulation until it finds its way into the 

 aqueous humour of the eye. May grow to the size of one half inch to 

 two inches in length; sometimes set up considerable irritation, and this 

 gives rise to more or less opacity of the cornea. It is not generally 

 entirely opaque. These worms move about in a lively manner ; appear- 

 ing near to the cornea, and then passing away and disappearing to a 

 certain extent. You should have no difficulty in detecting this by a 

 careful examination. It might be mistaken for a shred of lymph, but in 

 a short time it removes and again appears 



Symptoms —More or less irritation of the eye : may be noticed by the 

 owner or attendant, and you have some history of the case. There is a 

 haziness of the eye, but if you look for some time you will see something 

 inside moving about, first one way and then the other. It has been 

 described as an eel in water. If you meet with this you must remove 

 the worm, for if you allow it to remain, it will in most cases destroy the 

 eye. Whether it is advisable to remove it while the irritation remains, 

 or wait until it subsides, is a controverted point. I think the sooner it 

 is removed the better. Cast and secure the animal, elevate the head to a 

 certain extent, and with a guarded lancet make an incision and allow the 

 aqueous humour to escape, and with it the worm in most cases. There 

 is no great danger to be apprehended ; keep the animal quiet and apply 

 cold to the eye. You might give laxative medicine, good food, etc. A 

 slight speck remains sometimes where the incision was made. If you 

 operate on a case, and the aqueous humour escapes and the worm does 

 not, just leave it alone till the aqueous humour is reproduced, and the 

 worm may be absorbed, or you may take it out, but it sets up considera- 

 ble irritation. It is better to let it alone until the aqueous humour is 

 reproduced, and then operate again. Some operate without throwing 

 the animal, but I think it is not best, you may make a larger incision 

 than is desirable. The lancet used in human practice is the most appli- 

 cable. Keep in a darkened box, and if slight opacity is present, you may 

 use iodide of potassium internally. 



