208 



VISCERAL ANATOMY. 



Space of Tenon, between the globe and its capsule. 

 Vaginal Spaces, between the sheaths of the optic nerve. 



What Veins has the Eye ? It has two main trunks, the Superior and 

 Inferior Ophthalmic Veins, which empty into the cavernous sinus, after col- 

 lecting the blood from the smaller venous channels through the Vena; Vorti- 

 cosa of the choroid. The veins of the eye anastomose freely with the facial 

 veins, thus permitting the escape of venous blood in either direction. 



Describe the Nerves of the Eye. They are the 

 Nerve of Special Sense, the Optic, or 2d cranial nerve. 

 Mctor Nerves, the jd, 4th, 6th, filaments of the 5th, and some fibres from 



the sympathetic. 

 Sensory Nerve, the Ophthalmic Division of the 5th, giving off the 



Lachrymal, to the lachrymal gland, the conjunctiva, and the integument 

 of the upper eyelid. 



t Ganglionic. 



Frontal, ( Su P ra - trochlear - Nasal. \ Long Ciliary. 



I Supra-orbital. [ Infra-trochlear. 



FIG. 103. 



INT.TROCHLEAR 



NASAL 

 CILIARY BR. 



CILIARY GANGLION 



E-6 NERVE. 

 NASAL r, 



Sympathetic Branches^ arise from the medulla, cilio-spinal region, cavernous 

 and carotid plexuses, and join the 3d, 4th, 5th, and 6th nerves, sending 

 filaments to the dilator fibres of the iris, to the muscles of the orbit and lids, 

 to the ciliary ganglion, and to the walls of the arteries. 



