The Cure of Imperfect Sight by Treatment
Without Glasses - online book

The Original Bates Method, for correcting vision defects

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288 Normal Sight for Soldiers and Sailors
hardships of the upper air. It was formerly supposed that aviators maintained their equilibrium in the air by the aid of the internal ear; but it is now becoming evi dent from the testimony of aviators who have found themselves emerging from a cloud with one wing down, or even with their machines turned completely upside down, that equilibrium is maintained almost entirely, if not altogether, by the sense of sight.1 If the aviator loses his sight, therefore, he is lost, and we have one of those "unaccountable" accidents which, during the war, were so unhappily common in the air service. All aviators, therefore, should make a daily practice of reading small, familiar letters, or observing other small, familiar ob jects, at a distance of ten feet or more. In addition, they should have a few small letters, or a single letter, on their machines, at a distance of five, ten, or more feet from their eyes, arrangements being made to illuminate them for night flying and fogs, and should read them frequently while in the air. This would greatly lessen the danger of visual lapses with their accompanying loss of equilibrium and judgment.
As has already been pointed out, eye education not only improves the sight, but affords a means by which pain, fatigue, the symptoms of disease and other discom forts can be relieved. For this latter purpose it is of the greatest value to soldiers and sailors; and if, during the recent war, they had only understood the simple and al ways available method of relieving pain by the aid of the memory, not only much suffering, but many deaths from the destructive effects of pain upon the body might have been prevented. A soldier in a flooded trench, if he can remember black perfectly, will know the temperature of
1 Anderson: Lancet, March 16, 1918, p. 398; Hucks: Scientific American, October 6, 1917, p. 263.