THE OPHTHALMIC ARTERY. 



647 



pierce the sclerotic farther out than the others, and lie along the 

 middle of the eyeball. 



The anterior ciliary arteries arise from muscular branches of the andan - 

 ophthalmic, and perforate the sclerotic coat near the cornea : in the 

 eyeball they anastomose with the long ciliary. For the ending of 

 these vessels, see the dissection of the eyeball, pp. 797 and 798. 



The lachrymal artery accompanies the nerve of the same name to Lachrymal 

 the upper eyelid, where it ends by supplying that part, and joining 

 in the arches in the eyelids. It supplies branches, like the 

 nerve, to the lachrymal gland and the conjunctiva ; and it communi- to g land and 



Anterior meningeal. 

 Frontal. 



Lachrymal 

 gland. 



Lachrymal. 



Branch to outer 

 side of orbit. 



Communication with middle 

 meningeal. 



External rectus. 



Anterior ethmoidal. 

 Posterior ethmoidal. 



Supraorbital. 

 Posterior ciliary, outer 



trunk. 

 Posterior ciliary, inner 



trunk. 



Internal rectus. 

 Superior oblique. 

 Central artery of retina. 



Superior rectus turned 

 back. 



FIG. 229. DIAGRAM OF THE OPHTHALMIC ARTERY AND ITS BRANCHES. 



cates with the large middle meningeal artery by an offset through the 

 sphenoid al fissure. 



The lachrymal artery also sends twigs to the external rectus offsets 

 muscle, and a small branch with each of the divisions of the S 

 temporo- malar nerve ; these join the temporal and transverse facial 

 arteries. 



The supraorbital branch is small, and arises as the artery is Supraorbi- 



T . Tii .. , P , , tal branch. 



crossing the optic nerve, it takes the course ol the nerve ot the 

 same name through the notch in the margin of the orbit, and ends 

 in branches on the forehead. 



The muscular branches are a superior to the upper and outer Muscular, 

 muscles, and an inferior to the lower and inner muscles, as well as 

 small irregular offsets. 



The ethmoidal branches are two, anterior and posterior, and are Ethmoidal 

 directed through the canals in the inner wall of the orbit : branches, 



The posterior is the smaller of the two, and often arises in common posterior 



