Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
Dentro del libro
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Página 10
... distinct in the higher animals are represented by an unmodified cellular structure , performing all the func tions of the animal body , but in an imperfect manner . Each cell in such an organism will feel like a nervous cell , contract ...
... distinct in the higher animals are represented by an unmodified cellular structure , performing all the func tions of the animal body , but in an imperfect manner . Each cell in such an organism will feel like a nervous cell , contract ...
Página 14
... sense - organs , the eye , that we are now about to treat . It may be well to bear in mind and keep distinct what may be called the direct gifts of sight , and what are added by the mind as judgments based upon these 14 INTRODUCTORY .
... sense - organs , the eye , that we are now about to treat . It may be well to bear in mind and keep distinct what may be called the direct gifts of sight , and what are added by the mind as judgments based upon these 14 INTRODUCTORY .
Página 24
... distinct portions , viz .: 1 . A nervous expansion , the retina , specialized for respond- ing to light - vibrations ; 2. An optical instrument , the lens apparatus , placed in front of the retina , and spe- cially arranged to make the ...
... distinct portions , viz .: 1 . A nervous expansion , the retina , specialized for respond- ing to light - vibrations ; 2. An optical instrument , the lens apparatus , placed in front of the retina , and spe- cially arranged to make the ...
Página 25
... distinct , the object will be distinct ; if the image is blurred , the object , both in outline and in details of surface , will be blurred . If there is no image , no object will be visible . Therefore the image must be a fac- simile ...
... distinct , the object will be distinct ; if the image is blurred , the object , both in outline and in details of surface , will be blurred . If there is no image , no object will be visible . Therefore the image must be a fac- simile ...
Página 26
... distinct . But , in the mean time , the quantity of light is becoming less and less , and therefore the image fainter and fainter . If we suppose the hole to become a mathematical point , then one ray only passes from each point to the ...
... distinct . But , in the mean time , the quantity of light is becoming less and less , and therefore the image fainter and fainter . If we suppose the hole to become a mathematical point , then one ray only passes from each point to the ...
Términos y frases comunes
angle animals axis bacillary layer binocular eye binocular perspective binocular vision camera central spot ciliary muscle circle Cloth colors combined images cones corresponding points cross depth of space distance distant objects distinct divergence double images evident exactly Experiment external images farther fibers field of view gaze Helmholtz heteronymous homonymous horizontal horopter horopteric line identical points Illustrations impression inches inclination interocular space inverted jects left eye left-eye image lens light line of sight look median line monocular motion muscles naked eyes natural nearer nose oblique observer ocular optic axes optic centers optic chiasm optic convergence optic nerve outward parallel perceived perception perfect image perfectly point of sight position projection ray-lines rays refractive represent retina retinal images right and left right eye rotation sclerotic screen seen single shut side Sociology stereoscope surface T. H. HUXLEY tion torsion vertical meridian vibrations visual lines visual result vols
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