DISEASES AND TREATMENT OF THE HORSE 221 
eye hazy and weak. By watching closely the worm may be 
seen, sometimes in front and sometimes farther back. Irrita- 
tion of course continues so long as it remains. 
Treatment. — An operation is the only successful method 
of saving the sight. Cast the animal. While the head is held 
securely, with a small lance or sharp penknife make a small 
incision or cut across the sight, which allows the humors of 
the eye to run out. The worm is generally carried out with 
the discharge. Keep the animal quiet after the operation and 
put him in a clean, dark box stall for a few days. Bathe the 
eye with new milk twice a day and apply the. eye wash after 
bathing until the eye is healed. It generally takes a week or 
so to heal and for the fluid to re-form in the eye. A slight 
scar remains which in time gradually disappears. 
7. Glaucoma. 
Glaucoma is a hardening of the back humor of the eye. 
Causes. — It is caused by an injury of some kind — being 
pierced by a sliver, etc. — especially if the back portion be 
afifected. Natural decay of old horses may sometimes result 
in glaucoma. 
Symptoms. — Blindness develops gradually, accompanied 
by the peculiar high action in front exhibited by all blind 
animals. A close examination through the pupil discloses the 
fact that the eye is becoming hardened and of a grayish color. 
It is more frequently met with in gray horses. 
Treatment. — If the result of injury bathe with new milk 
three or four times a day. After wiping the parts dry apply 
the eye wash. If from old age and decay nothing will effect 
a cure. 
8. Inflammation of the Haw (Membrana Nictitans). 
This is the diseased or enlarged state of the cartilage in 
the corner of the eye. 
Causes. — Irritation or inflammation from the presence of 
foreign bodies — chaff, etc. — in the eye causes the haw to 
enlarge, so much so at times as to protrude from the corners, 
thus giving the animal an unsightly appearance, as well as 
being the source of a great deal of pain. 
Treatment. — When first noticed remove the cause of the 
irritation, if it can be detected, and bathe with new milk or 
lukewarm water two or three times a day. Wipe dry each 
