DISEASES OF THE LENS 143 



junctiva. In man it has been driven through the coats 

 of the globe into Tenon's capsule. 



Luxation backward into the vitreous is the most 

 common. It may remain there without causing any 

 special reaction, though it frequently causes, in trau- 

 matic cases, hemorrhage and inflammation of the inner 

 coats of the eye, eventually resulting in shrinking of the 

 globe. 



In a dislocated cataractous lens the treatment, in 

 man, would be to allow the lens to gravitate into the 

 anterior chamber, fix it with a needle, and extract it 

 by the usual method, by passing a loop or wire spoon 

 beneath it. This method would be impracticable in 

 animals. One might attempt to fix the lens if it can be 

 favorably placed and scoop it out carefully. An outer 

 or inferior section should be made, as one has a greater 

 field in which to work, and the wound can be more 

 readily inspected and cleansed. 



Lenticonus.— This is an anomalous condition, and 

 has been found in the pig and rabbit by Hess, as de- 

 scribed by Norris and Oliver. In each case the lens 

 was without a nucleus and cone shaped, with the apex 

 pointing backward. Although the anterior portion was 

 clear with normal capsule, the lens substance had under- 

 gone granular degeneration. Several investigators have 

 found this condition in the eyes of rabbits. 



