Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
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Página xv
... screen , 284 ; to see through a book or a deal board , 285 . CHAPTER V. VISUAL PHENOMENA IN OCULAR DIVERGENCE • 1. In drowsiness and probably in sleep , 287 ; 2. In other modes of producing divergence , 290 ; 3. Prevalence of law of cor ...
... screen , 284 ; to see through a book or a deal board , 285 . CHAPTER V. VISUAL PHENOMENA IN OCULAR DIVERGENCE • 1. In drowsiness and probably in sleep , 287 ; 2. In other modes of producing divergence , 290 ; 3. Prevalence of law of cor ...
Página 18
... screen 8 s . Similarly , the rays from a will spread out and form the circle a ' , and from c the circle c ' . Thus it is seen that rays from widely differ- ent points in the object mix with each other on 18 MONOCULAR VISION .
... screen 8 s . Similarly , the rays from a will spread out and form the circle a ' , and from c the circle c ' . Thus it is seen that rays from widely differ- ent points in the object mix with each other on 18 MONOCULAR VISION .
Página 19
... screen ; much more , then , would rays from contiguous points of the object mix . In such a case the mixing is so great that no recognizable image is formed at all . As the hole becomes smaller , the circles of dis- persion , a ' b ' c ...
... screen ; much more , then , would rays from contiguous points of the object mix . In such a case the mixing is so great that no recognizable image is formed at all . As the hole becomes smaller , the circles of dis- persion , a ' b ' c ...
Página 20
... screen . In the shade of a very thick tree - top the sun - flecks are circular like the sun ; but during an eclipse they are crescentic , or even annu- lar , according to the degree of obscuration . They are always images of the sun ...
... screen . In the shade of a very thick tree - top the sun - flecks are circular like the sun ; but during an eclipse they are crescentic , or even annu- lar , according to the degree of obscuration . They are always images of the sun ...
Página 21
... screen is suitably FIG . 7 . a b a S S placed - i . e . , at the exact place where the rays meet . The billions of rays from millions of points of the sur- face of the object are , as it were , sifted out by the law of refraction , and ...
... screen is suitably FIG . 7 . a b a S S placed - i . e . , at the exact place where the rays meet . The billions of rays from millions of points of the sur- face of the object are , as it were , sifted out by the law of refraction , and ...
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Términos y frases comunes
adjustment angle axis bacillary layer becomes binocular eye binocular perspective binocular vision blind spot camera central spot ciliary muscle circle colors combined image concave corresponding points cross defect depth of space distance distant objects distinct divergence double images evident exactly Experiment explained external images farther fibers field of view focal fore fovea Helmholtz heteronymous homonymous horizontal horopter horopteric line Illustrations impression inches inclined interocular space left eye left-eye image lens light line of sight look median plane middle monocular motion muscles nearer normal eye nose oblique observer ocular optic axes optic chiasm optic nerve optic vesicle outward parallel perceived perception perfectly phantom phenomena point of sight position primary projection pupil ray-line rays refractive represent retina retinal images right and left right eye right-eye image rotation sclerotic screen seen single sensation side stereoscope surface tion torsion turn the eyes vergence vibrations visual lines visual result