342 



HEAD AND NECK 



wall of the orbit, below the superior oblique muscle. At the 

 medial side of the orbit it ends by dividing into two terminal 

 branches viz., the frontal and the dorsal nasal (Fig. 136). 



The branches of the ophthalmic artery are very numerous, 

 and they can seldom be satisfactorily displayed, unless a 

 special injection has been made. They are : 



1. Lacrimal. 



2. Muscular. 



3. Arteria centralis retime. | 



4. Ciliary. 



5. Supra-orbital. 



6. Ethmoidal. 



7. Palpebral. 



8. Dorsal nasal. 



9. Frontal. 



Arteria Lacrimalis. The lacrimal branch accompanies 

 the lacrimal nerve, and supplies the gland of that name and 



Sinus venosus sclerae- 



Anterior ciliar)'. 

 artery 



Sclera 



Vena vorticofa 



Long posterior 



ciliary artery 



Anterior ciliary 

 artery 



Ciliary muscle 



_Long posterior 

 ciliary artery 



~Vena vorticosa 



_Long posterior 

 ciliary artery 



FIG. 135. Dissection of the Eyeball showing the Arrangement 

 of the Ciliary Nerves and Vessels. 



the conjunctiva. In each eyelid an arterial arch, the arc us 

 tarseus, is formed by the anastomoses of the two lateral 

 palpebral branches of the lacrimal with the two medial 

 palpebral branches of the ophthalmic. 



Rami Musculares come off at variable points, not only 

 from the main artery, but also from certain of its branches. 

 They supply the muscles contained in the orbital cavity. 



The Arteria Centralis Retina is a minute but important 

 artery. It pierces the infero - medial surface of the optic 

 nerve, about half an inch posterior to the eyeball, and 

 passes, in its substance, to the interior of the globe of 

 the eye. 



Arterice Ciliares are very numerous. Two groups are 



