mbinedwith proper intensities they produce the different sensa-tions of color; and that when excited simultaneously withproper intensities they produce white light. When anyperson is deficient in respect to one of these sets of nervefibres, he is said to be color-blind. Short and Long Sight. — If… … (2) Far-sighted Eye. (I) Normal Eye. (3) Near-sighted Eye, Fig. 83. diverging lenses. If the globe is too short in this direc-tion, the rays strike the retina before an image is formed;i.e, the image is formed back of the retina unless theobject is far away, and Jiypennetropia (long-sightedness)…
Physics
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