eye defects,1 while under the revised standards these de fects still constituted one of three leading causes of re jection. They were responsible for 10.65 per cent of the rejections, while defects of the bones and joints and of the heart and blood-vessels ran, respectively, about two and two and a half per cent higher.2
For more than a hundred years the medical profession has been seeking for some method of checking the rav ages of civilization upon the human eye. The Germans, to whom the matter was one of vital military importance, have spent millions of dollars in carrying out the sugges tions of experts, but without avail; and it is now ad mitted by most students of the subject that the methods which were once confidently advocated as reliable safe guards for the eyesight of our children have accom plished little or nothing. Some take a more cheerful view of the matter, but their conclusions are hardly borne out by the army standards just quoted.
For the prevailing method of treatment, by means of compensating lenses, very little was ever claimed except that these contrivances neutralized the effects of the various conditions for which they were prescribed, as a crutch enables a lame man to walk. It has also been believed that they sometimes checked the progress of these conditions; but every ophthalmologist now knows that their usefulness for this purpose, if any, is very lim ited. In the case of myopia3 (shortsight), Dr. Sidler-Huguenin of Zurich, in a striking paper recently pub-
1 Report of the Provost Marshal General to the Secretary of War on the First Draft under the Selective Service Act, 1917.
2 Second Report of the Provost Marshal General to the Secretary of War on the Operations of the Selective Service System to December 20, 1918.
3 From the Greek myein, to close, and ops, the eye; literally a condition in which the subject closes the eye, or blinks.