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OUR BODIES. AND HOW WE LIVE 



direction of all is that from the front. The direct light 

 should fall upon the print from above and from the left 

 side. The more nearly an artificial light resembles mel- 

 low daylight, the better. A flickering light is always bad. 



Artificial light should be 

 regulated by shades and 

 globes. Recently invented 

 round and hollow burners 

 used with kerosene oil give 

 an excellent light. 



Using the eyes at dusk, 

 or by artificial light in the 

 early morning, may lead to 

 serious disorders of vision. 

 The light reflected from 

 snow is a common source 

 of injury to the eyes. The 

 eyes of infants should not 

 be exposed to the glare of 

 electric lights or to the direct rays of the sun. 



372. Importance of Rest for the Eyes. After reading 

 steadily for some time we should rest the eyes by looking 

 at some distant object, even if only for a few moments. 

 A person should never read, write, sew, or otherwise use 

 the eyes when they tingle or smart, or when the sight is 

 dim or blurred. The eyes are weary and need a rest. 



The eyes are often weak after certain sicknesses. A 

 long rest should be given them after an attack of measles 

 or scarlet fever. 



373. Additional Hints for taking care of the Eyes. The 

 eyes should never be rubbed, particularly when they have 

 been irritated by some foreign substance. The sooner it 



FIG. 170. 



Showing the attachment of the recti, or 

 straight muscles to the eyeball, also 

 the distribution of arteries upon the 

 outer coat of the eye. 



