Image from page 255 of “The human body and health : an elementary text-book of essential anatomy, applied physiology and practical hygiene for schools” (1908)
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Title: The human body and health : an elementary text-book of essential anatomy, applied physiology and practical hygiene for schools
Year: 1908 (1900s)
Authors: Davison, Alvin, 1868-1915
Subjects: Physiology Hygiene
Publisher: New York : American Book Company
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons
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^ pressure of the muscles on thesides of the eyeballs whose coats have become weak.Nearsightedness is remedied by wearing double concaveglasses, which prevent. the rays of light from coming toa focus too soon. Farsightedness. — This is caused either by the eyebeing shorter than normal from before backward or by
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