Diseases of the dog and Diseases of the dog and their treatment diseasesofdogthe01ml Year: 1897 CATARACT. 367 should be an unfavorable one. Hereditary cataract shows little inclination to enlargement, as is also the case in senile cataract. In soft cortical cataracts we may see a rapid opacity of the lens in a few days or weeks. The sight is entirely lost and medical treat- ment is of little use. Therapeutic Treatment. A cataract may be removed by an operation, and this is much more advisable in the dog because it is, as a rule, attended without any great danger, and its results are generall
Diseases of the dog and Diseases of the dog and their treatment diseasesofdogthe01ml Year: 1897 CATARACT. 367 should be an unfavorable one. Hereditary cataract shows little inclination to enlargement, as is also the case in senile cataract. In soft cortical cataracts we may see a rapid opacity of the lens in a few days or weeks. The sight is entirely lost and medical treat- ment is of little use. Therapeutic Treatment. A cataract may be removed by an operation, and this is much more advisable in the dog because it is, as a rule, attended without any great danger, and its results are generally beneficial, producing a partial restoration of the vision. It is advisable to perform the operation of cataract after having first dilated the pupil by means of atropia, and then performing the operation under ether. The author has tried cocaine alone, but he finds it unsatisfactory. The animal must be tied up, placed on a table, and ether or chloroform administered. The operation is performed by one of the following methods: Opening- of the Capsule. The anterior capsule of the lens has to be opened in a transverse way with what is known as a dis- cission needle. (Fig. 80, a.) The fluid in the anterior chamber causes a gradual breaking up and reabsorption of the lens. An assistant holds the eyelids open and the operator seizes a fold of the conjunc- tiva with a small tenaculum, holding the eye firmly with the left hand, while hold- ing the needle in the right hand placed on the animal's head to steady it. The needle is then introduced into the cornea, in the middle of the lower external quad- rant, in such a direction as to meet the ciliary insertion of the iris and as far as the upper internal quadrant. Before the point of the needle has reached this latter point, however, it is placed firmly on the capsule of the lens, and this is cut through in a transverse direction with a lever-like movement of the needle (Fig. 81). The instrument must then be removed in the same way tha
Size: 803px × 2492px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
