TETEEINAEY OPHTHALMOLOGY. 125 



Filaria lachrymalis.— A white worm, about an inch 

 in length, found in the lachrymal duct and under side 

 of the eyelid and meinbrana nictatans. Their presence 

 sets up a conjunctivitis spoken of as a vermi?ious con 

 junctivitis. Remove and treat. Filaria papulosa. 

 A silvery delicate worm, about two inches long. Seen 

 in the aqueous and is very active. This was Barnum's 

 famous " Snake in the Eye." Sets up inflammation and 

 has to be removed. Best to make incision in upper 

 half of cornea near the scleral border. Then treat 

 the inflammation. The Echinococciis, the larval state 

 of the tape- worm of the dog has been found in the eye. 



Cysticercus has its origin between the choroid and 

 the retina, and causes detachment of the latter, finally 

 perforates it and enters the vitreous, and entering the 

 vitreous, sets up an irido-cyclitis and goes on to de- 

 struction of the eye. 



Pentastoma Taenioides has been found by Stitten ia 

 the horse's eye, but this case stands alone. 



