A glance at the history of the use of the term "eye-training" -- The vision of the savage compared with that of the civilized man -- The supposed acute sensibility of the blind and deaf -- Women's supposed special sensitiveness to colour-differences -- Peculiarities in the vision of certain forms of life other than human -- Eye-training and myopia -- Eye-training and better visual perception -- Summary: what can and what ought the school to do for the eyes