F. VISION. 



XLIV. Dissection of the appendages of the eye. 



1. Appliances. Fresh ox-eyes, including as much of the 

 appendages as possible; physiological operating case; 

 dissecting boards and pins, such as used for frogs; dog, 

 cat or rabbit; bone forceps; injection mass; syringe. 



2. Dissection. - Follow Gray; or Quain, Vol. III., Part III. 

 (1) Before fixing the eye to the board make a careful 



examination of the organ. 



(0) Trace the conjunctiva, describing its ocular and its 

 palpebral portions. Describe the plica semilunaris 

 and the caruncula. Do these two tissues have the 

 same relative size in man and the ox? Find and 

 describe \hepuncta lachrymalia. Find arid describe 

 the openings of the lachrymal ducts. How many are 

 there? Enumerate the conjunctival landmarks 

 which determine the inner from the outer side of the 

 eye. Enumerate the conjunctival landmarks which 

 determine the superior aspect of the eye. Is the 

 eye which you have a right or a left one ? 



(<) Observe the appendages of the eye. Do you find 



a remnant of the levator palpebrcz muscle ? Find 



the tarsal cartilages and the remnant of the orbicularis 



palpebrarium muscle. Find openings of the meibomian 



192 



