378 



LABORATORY MANUAL OF HUMAN ANATOMY 



In the SCLEEA (0. T. sclerotic coat, or white of the eye) exam- 

 ine the following : 



(a) Sulcus of the sclera (sulcus sclerae). 



Make a meridional incision through the sclerocorneal junction 

 and note 



(b) Cleft for the cornea (rima cornealis). 



(c) Venous sinus of the sclera, or canal of Schlemm (sinus venosus sclerae 



[canalis Schlemmi, Lauthi]). 



(d) Brown layer (lamina fusca). 



To what is this due? 



(e) Perforated layer of sclera (lamina cribrosa sclerae). 



In the CORNEA study the following : 



(a) Ring of conjunctiva (annulus conjunctivae). 



(b) Vertex of cornea (vertex corneae). 



(c) Border of cornea (limbus corneae). 



(d) Anterior surface (fades anterior). 



(e) Posterior surface (fades posterior). 



Make a razor section or a frozen section through the cornea, 

 and under the dissecting microscope observe 



A. and V. ciliaris anterior 



A. and V. conjunctivalis- 

 posterior 



A. and V. conjuncti- 



valis anterior 

 Sinus venosus V< 

 sclerae (Canalis 

 Schlemmi) 



FIG. 181. 



-M. rectus medialis 



A. and V. episcleralis 



V. vorticosa (vortex vein) 

 A. ciliaris posterior longa 



A. and V. ciliaris pos- 

 terior brevis 



Vessels of the va- 

 ^ gina N. optici 



Circulus anteri- 

 ijor in 

 cross-section 



N. opticus 



A. and V. cen- 

 tralis retinae 



Scheme of the arrangement of blood-vessels in the eyeball. Horizontal section. (After 

 Th. Leber.) (From Toldt, Anat. Atlas, Wien, 1903, 3 Aufl., p. 897, Fig. 1351.) 



(f) Epithelium of cornea (epithelium corneae). 



(ff) Anterior elastic layer (lamina elastica anterior [Bowmani]) (0. T. 



Bowman's membrane). 

 (h) Proper substance (substantia propria). 



