Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 45
... limits . It is only at compar- atively near distances , however , that the change is great . Between twenty feet and infinite distance the adjust- ment is almost imperceptible . We see , then , that the mode of adjustment of the eye is ...
... limits . It is only at compar- atively near distances , however , that the change is great . Between twenty feet and infinite distance the adjust- ment is almost imperceptible . We see , then , that the mode of adjustment of the eye is ...
Página 47
... limit , viz . , the nearer limit of five inches . Now in the passive state of the eye , as for instance in gazing on vacancy , or when the eye is taken out of the socket as a dead instrument , it is prearranged for perfect image of ...
... limit , viz . , the nearer limit of five inches . Now in the passive state of the eye , as for instance in gazing on vacancy , or when the eye is taken out of the socket as a dead instrument , it is prearranged for perfect image of ...
Página 50
... limit ; in the nor- mal eye it is between five inches , near limit , and infinite distance , the farther limit ( if limit it can be called ) ; in the myopic eye the nearer limit may be two inches , the farther limit four inches , or it ...
... limit ; in the nor- mal eye it is between five inches , near limit , and infinite distance , the farther limit ( if limit it can be called ) ; in the myopic eye the nearer limit may be two inches , the farther limit four inches , or it ...
Página 51
... limit , i . e . , structural limit , does not change . So also in the my- opic eye , with advancing age , the nearer limit or limit of adjustment recedes , but not the farther limit or structural limit . This remains the same . But , as ...
... limit , i . e . , structural limit , does not change . So also in the my- opic eye , with advancing age , the nearer limit or limit of adjustment recedes , but not the farther limit or structural limit . This remains the same . But , as ...
Página 62
... limits of the perception of sound - vibrations are very wide , viz . , more than eleven octaves . The limits . of perception of light - vibrations are far more restricted , viz . , only a little more than one octave . Now in many ears ...
... limits of the perception of sound - vibrations are very wide , viz . , more than eleven octaves . The limits . of perception of light - vibrations are far more restricted , viz . , only a little more than one octave . Now in many ears ...
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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