THE SPECIAL SENSES 



259 



strong bones of the head, and is padded with fat, which acts 

 as a soft elastic cushion for the eyeball. 



357. The Coats of the Eye. The walls of the eyeball are 

 made up of three distinct coats, or coverings. 



The outer covering, or sclerotic, is one of the toughest and 

 strongest membranes in the body, and serves as a kind of 



SUPERIOR RECTUS 



SUSPENSORY LIGAMENT 

 CILIARY PROCESSES 



CHOROID 



OPTIC NERVE 



CHOROID 



-INFERIOR RECTUS 

 FIG. 161. BLACKBOARD SKETCH. 

 Section of the Human Eye. 



elastic framework for the eye, and protects the delicate 

 structures within. That part of it which is visible is known 

 as the white of the eye. 



