STRUCTURE OF THE EYELIDS 



213 



has the usual structure ; it contains small sweat-glands and the fol- 

 licles of small hairs, and, in addition, at the edge of the eyelid, the 

 large hair-follicles from which the eyelashes grow. The epithelium of 

 the conjunctiva palpebras is columnar, passing at the edge of the lid 

 into the stratified epithelium of the skin ; it also becomes stratified in 





FIG. 247. VERTICAL SECTION THROUGH THE UPPER EYELID. 



(Magnified.) 



a, skin ; 6, orbicnlaris ; 6', ciliary bundle ; c, involuntary muscle of eyelid; d, conjunctiva; 

 e, tarsus ; /, Meibomian glaud ; 17, sebaceous gland near eyelashes, with modified sweat- 

 gland opening with it; h, eyelashes; i, small hairs in outer skin; j, sweat-glands; 

 , posterior tursal glands. 



the part which is reflected over the globe of the eye. The nerves of 

 the conjunctiva terminate for the most part in end-bulbs, which in 

 man are spheroidal, and formed chiefly of a small mass of polyhedral 

 cells, but in the calf and most animals they are elliptical, and consist 

 of a core and lamellated sheath (see Lesson XIX.) 



