Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 132
an image is focused by the crystalline lens upon theretina. The nerve cells are affected according to the colorof the light which falls on them. Impulses are sent to thebrain, and we become conscious of the image. A further study of color will be taken up later, and thesubject of the eye should… … Figure 107. — A Short-sighted Eye. Short-sightedness is caused by one, or both, of two things. The eyeball is too long, or the crystalline lens is too thick. When the image falls in front of the retina, the person has to bring the object very near the eye to get the image to move back upon the…
Physics
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