102 



BIOPHYSICAL CHARACTERISTICS OF THE EYE 



TABLE III-l 



Gullstrand's Simplified Eye 



Drugs pass through the cornea by diffusion quite readily; thus atro- 

 pine placed in the conjunctival sac formed by the lids rapidly reaches 

 the interior of the eye. 



Aqueous Humor 



A clear transparent fluid fills the cavity lying between the cornea and 

 the anterior surface of the crystalline lens. It is formed principally by 

 the ciliary bodies. In chemical composition this fluid consists chiefly of 

 water, traces of albumin, globulin, and a reducing sugar. An analysis of 

 the intraocular fluids of the horse as obtained by Duke-Elder [1927] is 

 shown in Table III-2. The intraocular pressure of this fluid varies 



