22 
CLAUDE D. MORRIS. 
that the disease is a slow, remittent process, having its origin 
in the posterior structure of the eye, working anteriorly and 
terminating in cataract. I have seen but a few cases of this 
form of ophthalmia, and have not treated it to any extent. I 
have, however, palliated for a time the symptoms that attracted 
the owner, and he would return in two or three months and 
would say, “Give me some more of that eye medicine, and 
when I get his eyes cured this time I will dispose of him.” The 
first noticeable symptoms are tears flowing over the cheek, and 
if the animal is in a bright light, there is always more or less 
blinking, indicating an utter intolerance to light. The cornea 
and lens are quite opaque, and if the case is one of some 
weeks, there will be a wrinkled or furrowed appearance of 
the upper lid and eyebrow. The attack generally comes on 
suddenly without any appreciable cause, and if in one eye, it 
seems smaller than its fellow and is drawn back into the orbit, 
as it were, as far as possible from the light which, from its sen¬ 
sitiveness, it cannot bear. Percivall, describing the opacity of 
the cornea and anterior chamber, says: “At the beginningthe 
anterior chamber preserves its pelluciaity so that the iris and 
pupil can be seen, the latter contracted, the former unchanged 
in color. In the course of two or three days, sometimes earlier, 
the chamber becomes obscure by a dingy white or amber-color¬ 
ed deposit floating within it, through which the pupil is hardly 
discernable. The opacity of the cornea proceeds from its cir¬ 
cumference to its center, until at last the whole of the surface 
becomes of a dull greyish hue, and in some cases blood vessels 
are seen ramifying over it. When the dullness is great the 
iris is invisible, but when it can be seen, it will be found that 
the pupil is narrow and contracted.” 
Some writers are inclined to give preference to some one 
particular structure of the eye as theseat of the disease. Wil¬ 
liams is of the opinion that it may be considered as involving the 
entire organ in its incipiency. Williams describes the remaining 
symptoms as those of “turbidity of the aqueous humor, and 
the corpora nigra lose their jetty blackness. The pupil be¬ 
comes more and more contracted, the conjunctiva intensely 
reddened, and in some cases the vessels crowd around the 
