VISION, 193 



and of sebaceous glands. Find and describe the 

 lachrymal gland as to location and size. 



Find the cut-off ends of the recti and oblique mus- 

 cles of the eye. 



Describe the location of the optic nerve with 

 respect to the cornea. 



What traces have you found of the capsule of 

 Tenon ? 



Enumerate the new landmarks which determine 

 the superior aspect of the eye; the internal aspect. 

 Are these extra landmarks sufficient to determine 

 whether the eye which you have is a right or a 

 left one? 



(2) Fix the eye to the board with corneal surface down, 

 pinning down flaps of the conjunctiva for support. 



(a) Dissect oat the four recti and the two oblique mus- 

 cles. One will find in the ox a rather heavy retractor 

 muscle in close relation to the optic nerve. This 

 should be left undissected until the other muscles 

 are demonstrated. 



(b} Trace further the intricate loculi of the capsule of 

 Tenon. 



(c~) Carefully separate from the eyeball all connective 

 and adipose tissue. 



(3) Remove the retractor muscle of the ox eye in 

 process of dissection, taking care not to sever any im- 

 portant blood vessels or nerves. 



(0) Locate and describe the vena vorticostz. How 



many are there? 

 () Find the anterior ciliary arteries. How many can 



be found ? 



Describe their relation to the tendons of insertion 



of the recti muscles. What tissues do they supply? 

 (c) Find the two long ciliary arteries. 



