THE SENSES 



The experiment, figure 458, is more striking when the two prisms of the 

 phakoscope which form two images of the candle are used. The pair of 

 images of the candle from the front surface of the lens not only approach 

 those from the cornea during accommodation, but also approach one another, 

 and become somewhat smaller, Sanson's images. 



FIG. 458. Diagram of Sanson's Images. A, When the eyes are focused for far 

 objects, and B, when they are focused for near objects. The figure to the right in A and 

 B is the inverted image from the posterior surface of the lens. 



\Cire.M. 



Had.M SupACerv.C, 



FIG. 459. Diagrammatic representation of the nerves of the intrinsic muscles of the 

 eye. Sup. Corp. Quad., superior corpora quadrigemina. Nuc. Ill, nucleus of the third 

 cranial nerve. Sup. Cerv. G., superior cervical ganglion. Circ. M ., circular muscles of 

 the iris. Rod. M., radial muscles of the iris. Ciliary G., ciliary ganglion (Greene). 



