36 



.MOVEMENTS OF THE PUPIL. [BOOK in. 



ciliary ganglion (I.e.) which is connected by means of its three roots, 

 (1 ) through the so-called 'short root' with the third nerve (r.b.), 

 (-) with the cavernous sympathetic plexus and so, along the 

 internal carotid artery, with the cervical sympathetic nerve (.s-// //>.), 

 and (3) through the so-called ' long root ' with the nasal branch of 

 the ophthalmic division of the fifth nerve (/./.). Besides the short 

 ciliary nerves, the eyeball is supplied by the long ciliary nerves 

 (I.e.) coming direct from the nasal branch of the ophthalmic 

 division of the fifth nerve. The short ciliary nerves, which are the 



V.opth 



FIG. 142. DIAGRAMMATIC REPRESENTATION OF-THE NERVES GOVERNING THE PUPIL. 



//. Optic nerve. /.</. ciliary ganglion, r.b. its short root from ///. oc.m.. third ov 

 oculo-motor nerve. syi. its sympathetic root. r.l. its loug root from V. ophUna. 

 the nasal branch of the ophthalmic division of the fifth nerve, s-c. the shoK 

 ciliary nerves from the lenticular ganglion. I.e. the long ciliary nerves from 

 the nasal branch of the ophthalmic division of the fifth nerve. 



most numerous, pierce the sclerotic at the hind part of the eyeball 

 and are distributed on the one hand to the blood vessels of the 

 choroid, ciliary processes and iris, and on the other hand to the 

 ciliary muscle'and to the sphincter of the pupil. The less numerous 



