196 LAB OKA TOR Y G UWE LV PHYSIOL OGY. 



(<) Locate, if possible, the course and distribution of 

 nerves and blood vessels. 



(4) With fine forceps grasp the margin of the iris and 

 with fine scissors cut out a sector limited posteriorly 

 by the ciliary body. 



(0) Study the boundaries of the posterior chamber. 

 () Find fibers of the suspensory ligament, 

 (c) Describe the anterior surface or the ciliary proc- 

 esses. 



(5) Make a circular incision with small scissors severing 

 the choroid and retina at about the line of the ora 

 serrata. Lift off from the dense vitreous humor the 

 whole ciliary apparatus and lens, place them, anterior 

 surface downward, upon a plate. 



(a) Describe the posterior aspect of the ciliary proc- 

 esses. 



() Describe the lens minutely, as viewed externally. 

 (<r) Make a section of the lens, describe its appearance. 

 Is the capsule discernible ? 



(6) Describe the retina as seen through the vitreous 

 humor. 



(#) Locate the entrance of the optic nerve. 



(b) Can the fovea centralis be located ? 



(V) Can the course of the retinal vessels be followed ? 

 2. b. Posterior dissection. 



(7) Let one member of the division remove the poste- 

 rior half of the sclerotic coat, after first fixing the eye 

 with cornea downward, using the recti muscles, in 

 this case also, for guys. 



(#) Note the vena vorticosa. 



(b'} Follow the ciliary nerves from their entrance into 



the eyeball, along their course between the sclerotic 



and choroid coats. 



