PARASITES OF THE EYE 179 



chamber. Usually there is considerable inflammation, 

 closure of the lids and watering of the eyes, redness of 

 the mucosa, clouding, and even vascularity of the 

 cornea. Still, in a majority of the cases, a portion of the 

 cornea remains sufficiently transparent to allow the 

 movements of the worm to be seen. Some tunes it will 

 temporarily retreat through the pupil and disappear 

 behind the iris. Sometimes only one eye is involved, in 

 other cases both eyes, and in some instances two or even 

 three parasites are found in one eye." 



If the worm can readily be seen in the anterior cham- 

 ber, an incision may be made in the margin with a 

 cataract knife, when the worm may be grasped with a 

 small pair of forceps and withdrawn. Cocain must 

 be used to anesthetize the cornea and strict antisepsis 

 observed. Much care must be observed not to wound 

 the iris or the cornea in this operation. 



The Cysticercus Cellulosa.— This has been found in 

 various portions of the eye — in the vitreous, the chorioid, 

 retina, the anterior chamber, the muscles of the globe, 

 and beneath the palpebral and bulbar conjunctiva. 



It has been found in the eye of man, the horse, the dog, 

 and the pig. When it appears in the outer coats of the 

 eye it is described as a white ovoid body. Within the 

 vitreous ''the cysticercus becomes visible as a bluish- 

 white bladder" (Duane). When in the anterior chamber 

 it has the appearance of a white cyst upon the iris. 



