54 
G. J. COLLINS. 
fistula will remain after perforation, which exposes the eye to 
subsequent serious inflammation. 
Treatment .— (i) Treatment of pre-existing local conditions, 
(2) local treatment of the ulcerative process, (3) constitutional. 
Treatment of pre-existing local conditions consists in remov¬ 
ing foreign bodies, if there be any, and relieving other local irri¬ 
tating conditions. Suppurative dacryocystitis or conjunctivitis 
must receive attention prior to treatment of the ulcerous process. 
Local treatment consists of antiseptic lotions—cocaine, atro¬ 
pine and eserine solutions; cauterization, curetting, paracentesis 
of cornea and division of ulcer; hot and cold compresses. 
Antisepsis .—Antiseptic solutions, such as sodium chloride, 
boric acid, corrosive sublimate, chinosol, and as good if not bet¬ 
ter than any of the above, germicidal discs. Iodoform, sprinkled 
upon the cornea, is good. Some practitioners use the ointment, 
but I don't like ointments for acute diseases of the eye. Others 
inject solutions of corrosive sublimate, argyrol or protargol, for¬ 
malin and sodium chloride subconjunctivally. This I never 
tried. 
To prevent spreading, either the curette or actual cautery 
may be employed.. But we like chemical or medicinal cauteriza¬ 
tion better—a stick of silver nitrate or cupric sulphate, tincture 
of iodine or phenol—applied by means of a swab or cotton. We 
cauterize every other day until healing is manifested. Along 
with this treatment antiseptic and astringent solutions are used. 
The antiseptic or astringent lotion used depending on which 
caustic is employed in cauterization. 
Paracentesis of the cornea is valuable when the intraocular 
pressure is excessive or the aqueous humor infected. This should 
be done with a paracentesis trocar, but a keratome or Graefe 
cataract knife will do. 
The animal should be well secured before attempting this 
operation, or serious injury to eye may result. Casting or the 
stanchion will suffice, but the operating table is far superior. 
Either local or general anaesthesia may be employed. We 
give two or three ounces of chloral hydrate, depending on size; 
