DISEASES OF OPTIC NERVE AND RETINA. 



371 



After enucleation, tie cavity of the eye is washed out with an anti- 

 septic fluid and the bleeding stopped by means of a tampon ; it should be 

 powdered with iodoform or sulphonal. MoUer advises to pack the orbit 



Muscles of the left eye : 



a, superior ; 6, external ; c, inferior straight muscles of the eye ; 

 1, eyeball ; 2, orbital arch cut through. 



with absorbent cotton and stitch the eyelids. Dogs are not badly dis- 

 figured by the loss of one eye, as the orbit becomes contracted and partially 

 filled with granulations. It is not advisable to use artificial eyes, as the 

 animal generally rubs them out. 



(3) Dropsy of the Anterior Chamber (Glaucoma). MoUer has 

 observed this a number of times in the dog. The anterior cham- 

 ber is very much enlarged, hard, and tense, so much so that the 

 eyelids cannot be closed. The bloodvessels of the conjunctiva and 

 the sclerotic membrane are injected, the cornea more or less 

 opaque, the pupil much contracted and greenish in color. The 

 animal cannot see. On post-mortem of one casp Moller found 

 total cataract and a partial luxation of the lens, liquefaction of 

 the vitreous humor of the eye, swelling of the papilla, and injec- 

 tion of the vessels of the retina. He was inclined to consider this 

 condition as identical with glaucoma in man. A number of authors 

 have seen similar conditions in dogs. 



(4) Diseases of the Optic Nerve and the Retina. These occur 

 very frequently in the dog, and may be recognized at first by 

 symptoms of what is known as " black cataract " — that is, impair- 

 ment of visual power (amblyopia), or complete blindness (amau- 

 rosis). Total blindness in the dog may be recognized by anyone, 



