Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 52
... horizontal and a vertical plane will be equal . This is necessary to bring all rays to a perfect point at the same distance . But eyes are found in which the horizontal curvature of the cornea or of the crys- talline , or both , is ...
... horizontal and a vertical plane will be equal . This is necessary to bring all rays to a perfect point at the same distance . But eyes are found in which the horizontal curvature of the cornea or of the crys- talline , or both , is ...
Página 88
... horizontally . Now the rays from the light ( L , Fig . 27 ) which penetrate the center of the pupil will pass directly on without refrac- tion except what is normal , and make its image ( Fig . FIG . 28 . a L 28 , L ' ) on the central ...
... horizontally . Now the rays from the light ( L , Fig . 27 ) which penetrate the center of the pupil will pass directly on without refrac- tion except what is normal , and make its image ( Fig . FIG . 28 . a L 28 , L ' ) on the central ...
Página 92
... horizontal direction the field of view of both eyes is more than 180 ° . Now , there being two retina , there are of course two retinal images of every external object ; and since retinal images are projected outward into space as ex ...
... horizontal direction the field of view of both eyes is more than 180 ° . Now , there being two retina , there are of course two retinal images of every external object ; and since retinal images are projected outward into space as ex ...
Página 99
... horizontal cir- cle passing through the point of sight and the centers of the eyes , O O ' , are usually supposed to be seen single . This is nearly true , except when the point of sight is very near . This circle has been called the ...
... horizontal cir- cle passing through the point of sight and the centers of the eyes , O O ' , are usually supposed to be seen single . This is nearly true , except when the point of sight is very near . This circle has been called the ...
Página 123
... horizontal plane of sight , so that the back and the upper edge are visible . If we shut the left eye , we see the back , the upper edge , and the whole right side , thus— The retinal image formed in the right eye is exactly like this ...
... horizontal plane of sight , so that the back and the upper edge are visible . If we shut the left eye , we see the back , the upper edge , and the whole right side , thus— The retinal image formed in the right eye is exactly like this ...
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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