THE CHOROID. 



227 



choroidea, similar to the lamina fusca of the sclerotic, from 

 which it is separated by lymph-spaces. Next to this layer is 

 the main stroma of the choroid, or vascular layer, which con- 

 sists of an abundance of lymphatics and large bloodvessels 

 imbedded in fibro-elastic tissue containing numerous pig- 

 mented stellate connective -tissue cells. 



FIG. 91. 



Section through ciliary body and tunics of eye at corneo-sclerotic junction (Wal- 

 deyer). A, epithelium of conjunctiva ; B, tunica propria of conjunctiva; C, 

 sclerotic; A laminae fusca and suprachoroidea ; E, F, choroid ; G, pars retinae 

 ciliaris and iridica; H, cornea; /, iris : K. M, radial and meridional portions 

 of ciliary muscle ; L, circular portion of ciliary muscle ; N, ligamentum pectina- 

 tum; 0. margin of anterior chamber; 1, anterior elastic lamina of cornea; 2, 

 posterior elastic lamina and endothelial layer of cornea : 3, spaces of Fontana ; 

 4, canal of Schlemm ; 5, 6, vessels tributary to canal of Schlemm ; 7, 8, 9, fibrous 

 bundles of sclerotic cut transversely; 10, origin of meridional ciliary muscle ; 

 11, 12, bloodvessels. 



Next within this is the thin choriooapillary layer, a dense 

 capillary network. Next to this is a thin, hyaline homo- 

 geneous vitreous layer (lamina basalis, membrane of Bruch), 

 the innermost layer of the choroid and separating it from the 

 retina. 



