William Horatio Bates, Better Eyesight Magazine — October 1920
“ It was found impossible to raise an army with even half normal vision in one eye, and in order to get the number of soldiers required it was necessary to accept for general service men whose vision could be brought up to half normal with glasses.2Such figures as the foregoing, terrible as they are, by no means exhaust the subject. In fact they are only the beginning. Errors of refraction are so common that we have learned to take them lightly. They are usually reckoned among minor physical defects, and the average lay person has no idea of their real character. ”
