THE HORSE—THE EYE AND EAR. 153 
ULCERATION AND THICKENING OF THE EYELIDS. 
Ulceration of the margins of the eyelids should be treated externally 
with causticum, putting five drops of the tincture in an ounce of water and 
applying from time to time until the ulcers disappear. An ointment made 
of two grains of red oxide of mercury and one drachm of vaseline is 
excellent. 
Thickening of the Eyelids may be treated by giving internally calcarea 
carbonica orsilicea. If it is due to granulations on the inside of the lid, apply 
with a camel’s-hair brush a lotion made of one-half drachm of tannic acid 
and one ounce of glycerine, using it once a day until a cure is effected. 
WARTS AND CALLOUS FORMATIONS. 
When such formations appear on the eyelids they should be treated 
with nitric acid, mixing ten drops in an ounce of water and applying night 
and morning. The mercury-ointment mentioned for Ulceration of the 
Eyelids is also good. It may be necessary to remove them with a knife or 
caustic. 
PREVENTION OF BLINDNESS. 
Young horses are specially subject to blindness as a result of hard 
driving or work, and one eye or both may be afflicted. Old horses are 
similarly affected, but not so frequently. When blindness is feared from 
such causes, danger may be averted by putting six drops of Fowler’s 
Solution of arsenic on a little sugar or meal, and giving two or three times 
aday. Give easily digested food and perfect rest. If the over-exertion 
has been continued some time, it may be too late to prevent the blindness; 
but in such cases the above remedy may be given in the morning, anda 
like dose of nux vomica in the evening for a considerable time. 
THE EAR. 
The ear of the horse is subject to but few diseases so far as we know. 
The external ear may become inflamed as the result of a blow, and be 
attended with an abscess which causes pain, and which it may be necessary 
to open. When the ear has become so injured, give arnica internally 
and apply it externally. 
Deafness is not very common, and little can be said of its specific 
causes, symptoms or location. Hence remedies can not be named here. 
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