420 



BIOLOGY FOR BEGINNERS 



PLATE 



S H O r T E H 



A wo rwe 



FIG. 135. 



The space in front between the lens and cornea is filled with 

 a watery fluid and the ball of the eye is occupied by a jelly-like, 

 transparent substance, which keeps the eye in shape. 



How We See. Light waves from an object pass through the 

 cornea to the lens which concentrates (focuses) them upon the 



