Chap. IV.] 



THE ORBIT AND 



49 



lead lotions are used. The bulk of the cornea is made 

 up of a great number of fibrous lamellae, between 

 which are anastomosing cell spaces containing the 

 corneal corpuscles. If the nozzle of a fine syringe 

 be thrust into the corneal tissue, the network of cell 

 spaces can be tilled with injection (Recklinghausen's 

 canals). When suppuration takes place within the 



3 



Fig. 9. A Horizontal Section of the Globe through the middle. 



a. Cornea ; b, sclerotic ; c, choroid ; rf, retina ; e, lens ; /, iris ; g, ciliary process ; 

 ft, canal of Scnlemm. 



proper corneal tissue, it is probably along these canals, 

 modified by inflammation, that the pus spreads, thus 

 producing onyx. The cornea contains no trace of 

 blood-vessels, except at its extreme periphery, where 

 the capillaries of the sclerotic and conjunctiva end in 

 loops. This lack of a direct blood supply renders 

 the cornea prone to inflame spontaneously in the 

 cachectic and ill-nourished. When inflamed, the tissue 

 always becomes opaque. In the affection known as 

 "E 4 



