40 



badly injured or in case it is impossible to return it to the 

 socket the entire protruding parts may be cut away as deeply 

 within the eye socket as possible; a pledget of cotton, satu- 

 rated with a one per cent, solution of carbolic acid er corro- 

 sive sublimate may be pressed into the cavity; a compress 

 bandage should then be placed over the eye. 



When the eye is dislocated by growing tumors in its sock- 

 et, or if there are malignant or fungoid tumors within the 

 eye, or if the eye is very badly injured, it may be necessary 

 to extirpate the eye ball, its muscles and the surrounding 

 tissues. For this the animal must be cast, anaesthised with 

 chloroform or some other ana3sthetic; an assistant holds the 

 eye lids apart; the operator grasps the cornea or the internal 

 or external rectus muscle with the forceps in his left hand; 

 the eye ball, the tumor, or the entire contents of the orbital 

 cavity, if necessary, are then removed, with the shears or 

 knife. The bleeding is checked by applying a pledget of 

 cotton, and a compress bandage as before described. 



ANIMAL PARASITES OF THE EYE. 



Filaria papilosa is a small, round, white worm that is 

 found most frequently in the vitreous humor; but is occa- 

 sionally observed in the aqueous humor and commonly 

 spoken of as the "snake in the eye." It is from one-half to 

 two inches in length, and it is very probable that the young 

 filaria reach the eye by way of the blood vessels, and develop 

 in the humors of the eye. However it is scarcely probable 

 that the humors of the eye are the natural habitat or home 

 of this parasite, since the same worm has been found in 

 other parts of the body. One man reports that he observed 

 a worm in the aqueous humor during a period of six years. 

 But a few months is usually the length of time this parasite 

 lives in the eye. A number of cases are recorded where 

 this parasite has produced inflammation of the cornea and 



