 | Smithsonian Institution. Board of Regents - 1869 - 488 páginas
...perception of different impressions. We do not see with the ear, nor hear with the eye, nor are we rendered sensible of sound by the nerves of the tongue....class, it is singularly obtuse to other impressions. Nor does the optic nerve embrace the entire range even of radiation. Some rays, when they reach it,... | |
 | Smithsonian Institution. Board of Regents - 1872 - 500 páginas
...impressions. We do not see with the ear, nor hear with the eye, nor are we rendered sensible of Bound by the nerves of the tongue. Out of the general assemblage...class, it is singularly obtuse to other impressions. Nor does the optic nerve embrace the entire range even of radiation. Some rays, when they reach it,... | |
 | Smithsonian Institution. Board of Regents - 1869 - 486 páginas
...we rendered sensible of sound by the nerves of the tongue. Out of the general assemblage of phyacal actions, each nerve, or group of nerves, selects and...class, it is singularly obtuse to other impressions. Nor does the optic, nerve embrace the entire range even of radiation. Some rays, when they reach it,... | |
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The optic nerve passes from the brain to the back of the eyeball and there spreads out, to form the retina, a web of nerve filaments, on which the images of external objects are projected by the optical portion of the eye. This nerve is limited to the... 
