To see is to perceive with the eye. Vision is more than seeing, as it contains the idea of knowing. Hence many can see without vision and many have visions without seeing. Optical acuity does not represent the visual habit, and its measure registers only the value of each eye as an optical instrumennt. The formula for visual acuity does not indicate total visual efficiency. Even with clear monocular images, binocular efficiency may be impaired, as it involves their fusion into a single image. Thus visual acuity depends not only on the dioptric apparatus but on the retina, the optic nerve paths and the central nervous mechanism. One may further state that vision is a function of the total organization of the individual, one phase of which inheres in the mechanics of the optical apparatus, another in the cerebral cortex and still another in the personality organization. Body-mind unity too