150 THE VETERINARY DOCTOR. 
of the iris. In the way of general care, keep the stable clean, well drained 
and ventilated, and exclude the light. Give good but not stimulating food. 
Since recovery is often effected within a very short time after the removal of 
the wolf-teeth it has been supposed that that operation is the cause of the 
cure, but it has no such virtue or connection. Owing to the hereditary 
tendency of this form of inflammation care should be taken in the breeding 
to avoid all animals that are afflicted with the disorder. 
CATARACT. 
An opaque body, white, gray or yellow, fills the pupil, shutting out 
the whole or a part of the vision. The lens alone is usually affected, though 
sometimes the enveloping sac is also involved. One eye or both may be 
affected, generally both, in old horses, in which blindness is usually caused, 
growing more confirmed as age advances. If the disorder is caused by 
an injury to one eye, the other usually continues sound. The cataract can be 
detected by bringing the horse to the light and looking into the eye. The 
causes are repeated attacks of inflammation; blows or wounds; imperfect 
nutrition, especially in old horses. 
Symptoms.—In a good light, in place of a clear, transparent pupil, may 
be seen a few white, gray or yellow specks, nearly round, with irregular 
edges; or there may be a mass of dull-white matter, half-transparent and 
mottled. The cataract may be in the center of the lens and scarcely 
ParTIaL CATARACT. CoMPLETE CATARACT, 
visible. White streaks may diverge from the center, especialy in old horses. 
The lens becomes more convex than before, sometimes hidden by a yellowish 
substance which fills the pupil (being then called false cataract). In 
confirmed cases the cataract may be seen at a distance; in recent cases it 
may be very obscure, when its discovery may be facilitated by enlarging 
the pupil by applying atropin to it (a solution of one grain to half an 
ounce of water). Besides the appearance of the cataract, its presence may 
be suspected from the horse showing an impaired sight, being timid, alarmed 
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