Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 17
... passes under the lids , becoming here thin and tender mucous membrane ; it is then reflected from the back part of the lid to the anterior surface of the white portion of the ball ( Fig . 2 , a a ) , then passes for- ward again over the ...
... passes under the lids , becoming here thin and tender mucous membrane ; it is then reflected from the back part of the lid to the anterior surface of the white portion of the ball ( Fig . 2 , a a ) , then passes for- ward again over the ...
Página 19
... passes forward , contracts to a slender tendon , passes through a loop situated in the forward part of the socket , on the inner ( nasal ) and up- per side ( Fig . 3 , c ) ; it then turns upon itself backward and outward , passes over ...
... passes forward , contracts to a slender tendon , passes through a loop situated in the forward part of the socket , on the inner ( nasal ) and up- per side ( Fig . 3 , c ) ; it then turns upon itself backward and outward , passes over ...
Página 26
... passes from each point to the object , and goes to its own place in the image ( Fig . 6 , B ) , and the conditions of distinct- ness are fulfilled ; but the image is now infinitely faint , and therefore invisible . If , now , we try to ...
... passes from each point to the object , and goes to its own place in the image ( Fig . 6 , B ) , and the conditions of distinct- ness are fulfilled ; but the image is now infinitely faint , and therefore invisible . If , now , we try to ...
Página 28
... passes straight through without deviation ; rays a little way from the central are bent a little ; rays farther away are bent more and more according to their angle of divergence , so that they all meet at the same point , b ...
... passes straight through without deviation ; rays a little way from the central are bent a little ; rays farther away are bent more and more according to their angle of divergence , so that they all meet at the same point , b ...
Página 67
... passing a spark of electricity through the head or through the eye in such wise as to penetrate the retina or traverse the optic nerve . The phenom- enon has also been observed in cases of extirpation of the eye at the moment of section ...
... passing a spark of electricity through the head or through the eye in such wise as to penetrate the retina or traverse the optic nerve . The phenom- enon has also been observed in cases of extirpation of the eye at the moment of section ...
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Términos y frases comunes
angle axis bacillary layer binocular eye binocular perspective binocular vision camera central spot ciliary muscle circle colors combined images cornea 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 law of corresponding left eye left-eye image lens light line of sight look median line middle monocular motion muscles naked eyes 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 pupil ray-lines rays refractive represent retina retinal images right and left right eye right-eye image rotation sclerotic screen seen single shut side stereoscope surface tion torsion turn the eyes vergence vertical meridian vibrations visual lines visual result