Organ of Vision. 



223 



Epithelial layei 



Membrana Deacemetil 



Canalia ScMemmii 



Corpus v i t T e u 



301. Section of the Eyeball. Magn. = 4. 



After Ferdinand Arlt sen. 



The choroid and iris form the second layer of the eyeball. The 

 former lies on the inner surface of the sclerotic ; its outer pigmented 

 connective tissue layer is similar to the Lamina fusca of the sclerotic ; the 

 middle layer of the choroid is formed by the bloodvessels, whose net- 

 work of capillaries was called Lamina Euyschii ; the inner surface, which 

 is smooth, is covered by the hexagonal pigmented cells of the retina - 

 Tapetum nigrum. 



At the anterior margin of the sclerotic , the choroid becomes 

 thickened, forming the Corpus ciliare. The superficial layer of the ciliary 

 body is the Musculus ciliaris s. Tensor chorioideae (see Fig. 303), (meridional 

 and radiating fibres) ; the deep layer, the Corona ciliaris, a circle of from 

 70 85 folds, each of which is called ciliary process, Processus 

 ciliaris. The indented border between the folded and smooth part of the 

 choroid is the Or a serrata. 



