SOCIETY MEETINGS. 
523 
nected with the lesions of the eye arid are produced by the same 
cause. 
An examination of the eyes from a number of these cattle, 
showed abscesses of the cornea. These abscesses varied in size 
from a minute point of opacity or small ulceration to a bulging 
staphyloma occupying the entire area of the cornea and in 
man} cases extending into and breaking down the adjacent in¬ 
terior tissues. From several there was a pustular discharge 
running down over the face and excoriating the skin. Where 
there was yet only a small opaque spot, a closer examination 
disclosed a small ulcer containing small granules like dust or 
sand appearing as foci. The position of this spot was generally 
in the centre of the cornea—at a line that would be made by 
the approximated lids. Where larger opaque areas were seen, 
they were generally confined to the corneal surface. The smaller 
abscesses were well circumscribed. There was no inflammation 
of the surrounding conjunctiva of the eyelids, nor of the cornea 
and the membrana nictitans. No vascular zone of distended 
blood vessels at the junction of the cornea and sclera was ap¬ 
parent. In some animals only one eye was affected. This was 
sufficient to eliminate “ Catarrhal Conjunctivitis.” 
Where the staphyloma occupied all the area of the cornea 
and bulged from the normal surface in the form of a blister or 
bladder, it acted as a mechanical obstruction to the closing of 
the lids. The superior lid was retracted and appeared as a 
swelling over the uncovered, opaque cornea, and this caused a 
very painful expression. 
A number of these eyes were dissected and the optic nerve 
and adjacent anterior tissues were found to be normal in size 
and appearance where the abscesses were confined to the cor¬ 
nea. 
It is known that repeated irritation of the digestive tract 
will cause serious derangement to the nervous system. That it 
may ultimately result in affecting the cells of the cornea and 
their nutrition is not improbable. 
'The cells of the cornea tissue proper contain very many 
terminal nerve filaments, but it is very poorly supplied with 
blood vessels and therefore predisposed to loss of sensation. 
Sensation of the cornea, and particularly the conjunctival layer 
and the membrana nictatans, is supplied by the terminal nerve 
filaments of the ophthalmic branch of the fifth pair of cranial 
nerves, or the trigemini, through its sensitive roots, and in the 
conjunctiva^ there are also the corpuscles of Krouse. In the 
