709 
S , 
INFECTIOUS OPHTHALMIA OF CATTLE. 
7 7 -—___ 
of a bichloride solution to the region of the eyes, supplemented 
by smearing the lids with an ointment which will be effectual 
in keeping flies away. 
The first observable symptoms are swollen lids, intense 
lachrymation, photophobia with its consequent spasm of the 
orbicularis, congestion, pain and opacity of the cornea, to be 
followed by a staphylomatous bulging of the cornea due to 
intra-ocular pressure. In one or more days the discharge 
becomes muco-purulent, and if the disease is not arrested at tin’s 
stage the inflammation rapidly involves the substance of the 
cornea and deeper structures of the eye. Inflammation of the 
cornea is usually diffuse and affects the proper corneal tissue 
although it may be limited to the epithelium on external sur¬ 
face. Keratitis is almost an invariable sequence in advanced 
cases. . The cornea presents an opalescent appearance, and the 
formation of an ulcer is preceded by a stage of infiltration and 
t e inflamed spot is a little raised and more densely opaque. 
The ulcerative process often spreads widely, eats deeply, be¬ 
comes complicated with corneal abscess or abscess of anterior 
chamber (hypopyon), iritis, choroiditis and synechia. Perfora¬ 
tion of the cornea is not an infrequent termination, especially in 
those cases which have not received remedial interference while 
the disease is in its incipient stage. The alternations resulting 
from intis cannot be observed till after the cornea has suffi¬ 
ciently cleared to permit inspection. The danger of adhesion 
of the iris to capsule of lens should be anticipated, however, and 
if possible such a termination frustrated. Formative opacities 
of the lens seem to be a rare termination of the diseased pro¬ 
cesses. Limited to the subjective symptoms usually, in the 
absence of focal illumination and the ophthalmoscope, we are 
led. to believe that such conditions are sometimes left behind, 
which only produce visual aberration and hence are of no par¬ 
ticular consequence practically. Cataract, however, is some¬ 
times complete or progressive. 
Treatment. It is much easier to prescribe treatment for 
a wild western steer, irritated by a degree of blindness, than it 
