. Dr. Evans' How to keep well; . e run of men. You must exercise care in selecting your oculist as you do in selecting 132 THE EYE your milkman, grocer, or husband. If you need glasses you should wearthem. Strained Eyes.—Mrs. M. M. writes: I am SJf years old and am havingtrouble with my eyes for the first time. I am cooking on an oil stove. Theroom is small and is heated by an oil stove. I cook two meals each day byoil lamp,, making six burners lighted at one time. I am poor and do wash-ing every day. Two children depend on me. Do you think the kerosene isthe cause of my trouble f Reply.—Six b
. Dr. Evans' How to keep well; . e run of men. You must exercise care in selecting your oculist as you do in selecting 132 THE EYE your milkman, grocer, or husband. If you need glasses you should wearthem. Strained Eyes.—Mrs. M. M. writes: I am SJf years old and am havingtrouble with my eyes for the first time. I am cooking on an oil stove. Theroom is small and is heated by an oil stove. I cook two meals each day byoil lamp,, making six burners lighted at one time. I am poor and do wash-ing every day. Two children depend on me. Do you think the kerosene isthe cause of my trouble f Reply.—Six burners would use up a lot of air and pour a lot of car-bonic acid into the room. Unless you ventilate well this would be tryingon your general health. It would not hurt your eyes especially, the light is poor and you strain your eyes you may be harming age is about right for the development of senile changes in the eye,principally long-sightedness. See if glasses will not relieve you. CHAPTER XI The Ears. THROAT Dl\uri HEAT> AN EARLY SIGN OF DEAFNESS The ordinary method of hearing is that in which sound waves strike theear drum and the impulse is transmitted by the bones of the ear to the placewhere bony movement irritates certain delicate nerves. The irritation ofthese nerves is carried to the brain, where the impulse is recorded as a sound. Impulses can be carried to these nerves by bones other than these smallbones of the ear drum. In fact, the bones are in touch with each other sothat some littlesound impulses cantravel to the earfrom far - awayplaces. We canhear a little withour hands and ourfeet; we can hearstill more with thebones nearer theear bones. Bournier offersthe following test for the extremely early stages of failing hearing: The foot of a vibrating,deep-toned timing fork is held against the elbow or wrist. If the hearing isnormal, the vibrations are felt, but no sound is heard. If the hearing isbeginning to fail, the sound of the vib
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