184 
GEO. G. VAN MATER. 
accession of the disease. Even after the first attach, there is a 
blnish ring around the margin (limbus) of the transparent cor¬ 
nea. The eye seems smaller than the other at first , because it 
is retracted in the orbit, and often after several attachs because 
of actual shrinkage (atrophy). The upper eyelid ( j palpebrarium 
super 10ns) in place of presenting a continuous arch has at about 
one-third from its inner angle (internal canthus) an abrupt bend, 
caused by the contraction of the levator muscle. The front of 
the iris has exchanged some of its clear, beautiful brilliancy for 
a lustreless yellow, and the depths of the eye (as before men¬ 
tioned) presents a greenish yellow reflection. The pupil remains 
a little contracted, except in advanced and aggravated cases, 
when with an opaque lens (cataract) it is widely dilated. If one 
eye only has suffered, as is common, the contrast in these re¬ 
spects with the sound eye is all the more characteristic. Another 
feature is the erect, attentive carriage of the ear to compensate 
to some degree the waning vision. The attacks vary greatly in 
different cases, but the recurrence is characteristic and all alike 
lead to cataract and intraocular effusion with pressure on the 
retina and abolition of sight. 
The prevention of this disease is the great object to be aimed 
at, and this demands the most careful breeding, feeding, housing 
and general management as indicated under causes. Much can 
also be done by attention to location, drainage, etc. 
The treatment is unsatisfactory, but is largely the same for the 
common internal ophthalmias. Some cases, like rheumatism, 
are benefited by scruple doses of powdered colchicum, and two 
dram doses of salycilate of soda, twice daily. In other cases, 
with marked hardness (tension) of the bulbous from intra ocular 
effusion, puncture, or iridectomy, has helped. During conval¬ 
escence, a course of tonics,—two-dram doses of oxide of iron, 
nux vomica, ten grains; soda sulphate, one ounce, daily, is de¬ 
sirable to invigorate the system and aid in warding off another at¬ 
tack. The knocking out of wolf-teeth and cutting out of the 
membrana nictatans is preposterous. The temporary recovery 
would take place in two weeks though no such thing had been 
