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 the ...
... 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 the ...
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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 cones corresponding points cross depth of space distant objects distinct double images evident exactly Experiment external images eyes by squinting farther fibers field of view figures finger focal adjustment foreground forms of perspective gaze heteronymously homonymously horizontal horopter identical points impression inches inclination interocular space inverted jects left eye lens less convergence light line of sight look median plane monocular images motion muscles naked eyes nearer nose object or scene oblique observer ocular optic axes optic chiasm optic convergence optic nerve outward parallel perceived perception of depth perfect image perfectly point of sight position projection rays refractive represent retina retinal images right and left right eye rotation sclerotic screen seen single side stereoscope stereoscopic pictures surface tion torsion turn the eyes unite visual lines visual result