366 DISEASES OF CATTLE. 



DISLOCATION OF THE EYEBALL. 



The eyeball may be torn out of its socket by the horus of another ani- 

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

 cane, or probe in the hands of a human brute. 



Treatment. When the optic nerve is not lacerated and the retractor 

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

 advisable. This, however, must follow very soon after the injury 

 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 firm compress over the injured eye and keep it con- 

 stantly wet with cold water, containing one drain 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 nienibrana nictitans is subject to inflammation and swell- 

 ing from the extension of conjunctivitis, or direct injury by foreign sub- 

 stances. It presents a red, swollen appearance, accompanied by con- 

 siderable pain and a profuse flow of tears. A slight scarification with 

 a sharp knife and the application of a cooling lotion, such as recom- 

 mended for conjunctivitis, will soon reduce the swelling and restore it 

 to its normal function. 



There is, however, a tendency for an inflammation of this membrane 

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

 manent 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 enlarged 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. 



