SENSE OF SIGHT. 



543 



fore, the most posterior portion of the cornea, and inasmuch as the 

 space directly behind the cornea is the anterior chamber, this epi- 

 thelium forms the anterior boundary of this space. These epithelial 



Corneal 

 epithelium, 



Basal cells. 



Anterior 

 elastic 

 membrane 



Substantia 

 propria. 



FIG. 321. Section through the anterior portion of human cornea ; X 500 (Bohm and 



Davidoff). 



cells are continuous with those covering the anterior surface of the 

 iris. The cornea contains no blood-vessels, these ending in the form 



Sclera. < 



Lamina supra- 

 choroidea. 



Lamina vascu- 

 losa Halleri. 



Lamina chorio- 



capillaris. 

 Glassy layer. " 

 FIG. 322. Section through the human choroid ; X 130 (Bohm and Davidoff). 



of loops at its circumference. Nor are there distinct lymphatics, 

 though the channels which lodge the nerves are believed to serve 

 this purpose. Branches of the ciliary nerves are supplied to it, 



