DISEASES OF THE CRYSTALLINE LENS 



421 



same time the lens must be detached by means of an even, but not too 

 energetic, pressure upon the other side of the eye from the wound, and 

 then by means of the Daviel 's spoon the lens is pushed out of the opening 



Fig. 146. — Lobular extraction of lens. (Cadiot and Breton.) 



(Fig. 140) . The subsequent treatment is the same as in linear extraction. 



Dislocation of the Lens. — This operation is undertaken in hard 

 cataract, and is performed in the following manner: 



By means of a cataract needle pushed through the sclerotic mem- 



FiG. 147. — Dislocation of the lens. (Cadiot and Breton.) 



brane, or the cornea, steady pressure was made on the upper part of the 

 lens, and it was pushed down into the lower posterior part of the vitreous 

 chamber of the eye. The needle is held like a penholder and is introduced 

 into the sclerotic membrane at the side of the eye about 2 to 4 mm. 



