CHAP, in.] 



SIGHT. 



538. Before proceeding it will be desirable to recall to 

 mind the nervous supply of the eyeball, omitting for the pres- 

 ent the nerves governing the six ocular muscles which move 

 the eyeball as a whole. 



The eyeball is supplied, in the first place, by the short ciliary 

 nerves (Fig- 147 s.c.) coming from the ophthalmic or lenticular, 

 or ciliary ganglion (l.c.) which is connected by means of its 

 three roots, (1) through the so-called ' short root* with the 

 third nerve (rA), (2) with the cavernous sympathetic plexus 



FIG. 147. DLUHLA 



IL Optic nerve, l.g. ciliary ganglion. rJb. its short root from ILL c.m, 

 third or ocolo-motor nerve, tym. its sympathetic root, r.l. its long root from F. 

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



short ciliary nerves from the lenticular gang! inn Lc. the long ciliary 



frnm the MMl hriK* *f *V qJithal^ir, rfironnn of the fifth] 



and so, along the internal carotid artery, with the cervical sym- 

 pathetic nerve (*ynu), and (3) through the so-called *long root' 

 with the nasal branch of the ophthalmic division of the fifth 

 nerve (rJ.). Besides the short ciliary nerves, the eyeball is 

 supplied by the long ciliary nerves (/..) coming direct from 



