ENTOZOA IN THE EYE. 217 



tions two cases of this kind, in which the eye was 

 preserved, but the sight was lost. 



Several cysticerci might exist at the same time 

 in the vitreous humour, as has been observed in 

 the pig. 



One eye only is ordinarily affected, so that the 

 prognosis would generally be more favourable than 

 that of an ordinary attack of amaurosis ; but the 

 frequent multiplicity of cysticerci would warrant the 

 apprehension, in some cases, that these entozoa were 

 also present in the "nervous centres. 



Some benefit may be derived from an early opera- 

 tion, if the cysticercus can be extracted through the 

 cornea. In one case, where Graefe made an opening 

 through the cornea, and removed the cysticercus 

 unbroken, the eye and sense of vision were both pre- 

 served ; in others the sight was destroyed. 



The entozoa which have been observed in the 

 appendages of the eye are : — The trichina spirahs ; 

 the filaria Medinensis ; the cysticercus telse cellulosse ; 

 hydatids ; and a small nematoid worm, of uncertain 

 species ; tliis last was probably the Guinea-worm, 

 although Guyot, who described this entozoon, states 

 that the Guinea-worm is not found in Congo, where 

 he observed it amongst the negroes. (See " Synopsis," 

 p. 47). 



The treatment of any of these entozoa would be 

 similar to that of the same species, when they exist 

 in the muscular, or in the areolar tissue, or beneath 

 the integuments in other parts of the body. 



