410 
R. H. HARRISON. 
obtained that I have been experimenting, and after treating 
over a hundred cases have found a method of treatment which 
is at least far more satisfactory in its results than the method 
laid down in the different text-books. 
The different methods of treating the human eye and 
that of the horse are not comparative ; for the veterinary 
surgeon who has studied and dissected minutely the eye of 
both animals (human and equine) will observe great differ¬ 
ences between them in a normal state—while again the habit 
and conditions of both animals is widely different. 
These experiments have extended over a period of eight 
years, during my practice in Boston and the West, and over 
one hundred animals, horses and mules, have been operated 
upon, and the results will be given. 
Care should be used in every case that the conjunctival 
sac and the cornea be thoroughly examined, for although 
the membrana nictitans is very useful in removing foreign 
bodies from the cornea, bringing them toward the internal 
canthus so they may be washed away by the tears, sometimes 
the foreign body becomes imbedded in the cornea and the 
membrane cannot remove it, and straightway you have an 
inflammation of the cornea involving the iris and adjacent 
tissues. In horses’ eyes, which are as a rule brown, a magni¬ 
fying lens is of much service in detecting foreign bodies. 
Tension of the Eye-Ball .—This is a useful and important 
guide in determining whether to operate or not, and in test¬ 
ing the eye I have found the most practical way is to exert 
alternating pressure of two fingers placed on the upper lid, 
testing both eyes at once, using the index and middle 
fingers of both hands on the eyes. In this way a slight 
variation of the tension of the two eyes can be detected, and 
if found harder than normal, the operation is indicated ; but 
il softer, most emphatically contra-indicated, for surgical 
interference means an early and incurable blindness. 
It is a mistake to use the solution of atropia too long after 
the eye has been operated upon, as it causes too much 
photophobia, especially if the animal has to be worked during 
the day. 
