DISSECTION OF THE ORBIT 



347 



is placed more posteriorly. It is supplied by the inferior 

 division of the third nerve. 



Fascia Bulbi (O.T. Capsule of Tenon). The connections 

 of the fibrous sheath of the eyeball are somewhat com- 

 plicated, and they cannot be satisfactorily displayed, in every 

 detail, in an ordinary dissection. The fascia may be studied 



Levator palpebrzs superioris- 

 Superior rectiu 



Superior oblique 

 Lacrimal gland 



Lateral rectus 



Sixth nerve 



Ciliary ganglion 

 Naso-ciliary nerve- 



Ophthalmic division 



of fifth nerve | 

 Maxillary division 

 of 



.ry division '. 



fifth nerve 



Motor root of_ 

 fifth nerve 



Semilunar ganglion/ / 



Mandibular division of fifth nerVt 



Trochlea 



Superior oblique 



Third nerve 



Sixth ner\ 

 Fourth neive 



FIG. 138. Dissection of the Orbit and the Middle Cranial Fossa. Both 

 roots of the fifth nerve with the semilunar ganglion are turned laterally. 



from a threefold point of view (i) in its connection with 

 the eyeball; (2) in its connections with the muscles inserted 

 into the globe of the eye; and (3) in its connections with 

 the walls of the orbit. 



The relation which the fascia bulbi bears to the eyeball 

 is very simple. The membrane is spread over the posterior 

 five-sixths of the globe the cornea alone being free from it. 

 Anteriorly, it lies in relation with the ocular conjunctiva, with 

 which it is intimately connected, and it ends by blending 



