366 DISEASES OF CATTLE. 



Treatrtierxi. — Wlien the outlines of the tumor, whether fungoid, 

 bony, or fibrous, can be detected, an operation for its removal should 

 be undertaken as soon as the sight of the eye is in any manner dis- 

 turbed. 



DISLOCATION OF THE EYEBALL. 



The eyeball may be torn out of its socket by the horns of another 

 animal in a fight, or it may be crowded out with the blunt end of a 

 club, cane, or probe in the hands of a brutal attendant. 



Treatment. — \^^len the optic nerve is not lacerated and the retrac- 

 tor muscles at the back of the eye are intact, an attempt at reduction 

 is advisable. This, however, must follow very soon after the in- 

 jury — before swelling takes place. Divide the outer corner of the 

 eyelid to enlarge the orifice, then by pressure with the fingers of both 

 hands placed upon the sides of the eye the ball may be put back into 

 its place. Apply a firai compress over the injured eye and keep it 

 c-onstantly wet with cold water containing 1 dram of sugar of lead to 

 each quart. 



If the attempt at reduction proves unsuccessful the artery at the 

 back of the eye should be ligated, and then the whole mass cut off as 

 deep within the orbit as possible. The orbital cavity should be 

 packed daily with fresh absorbent cotton after washing it out with a 

 3 per cent solution of carbolic acid or 10 per cent dilution of creolin. 



INFLAMMATION AND ENLARGEMENT OF THE HAW. 



The haw, or membrana nictitans, is subject to inflammation and 

 swelling from the extension of conjunctivitis, or direct injury by for- 

 eign substances. It pi-esents a red, swollen appearance, accompanied 

 by considerable pain and a profuse flow of tears. A slight scarifica- 

 tion with a sharp knife and the application of a cooling lotion, such 

 as recommended for conjunctivitis, will soon reduce the swelling and 

 restore it to its normal function. 



There is, however, a tendency for an inflammation of this mem- 

 brane to take on a chronic character, which may eventually result in 

 a permanent enlargement, resembling a tumor. When it attains 

 sufficient size to protrude itself permanently over the eye, or project 

 between the lids so as to obstruct the sight, its removal may become 

 necessary. A threaded needle is passed through the body of the en- 

 larged mass, by which the membrane is drawn out as far as possible, 

 then with a blunt pair of scissors it may be dissected away from its 

 attachments. The eye is afterwards treated with simple cooling 

 lotions. 



