Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
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Página 20
... the divergent pencil , b L L , the central ray 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 20 MONOCULAR VISION .
... the divergent pencil , b L L , the central ray 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 20 MONOCULAR VISION .
Página 21
... angle of divergence , so that they all meet at the same point , b ' . Similarly all the rays proceeding from a , and fall- ing on the lens , are brought to the same point , a ' , and from e to the point c ' , and so also for every ...
... angle of divergence , so that they all meet at the same point , b ' . Similarly all the rays proceeding from a , and fall- ing on the lens , are brought to the same point , a ' , and from e to the point c ' , and so also for every ...
Página 47
... angles to the optic axis . Such eyes are said to be astigmatic , because the rays from any radiant are brought , not to a single focal point , but to two focal lines , a horizontal and a vertical , which are shorter or longer , and at a ...
... angles to the optic axis . Such eyes are said to be astigmatic , because the rays from any radiant are brought , not to a single focal point , but to two focal lines , a horizontal and a vertical , which are shorter or longer , and at a ...
Página 61
... the retina is always referred directly outward at a right angle to the point impressed , and therefore to the opposite side of the field of view . These colored spectra have been called phosphenes . Observe , 6 SPACE PERCEPTION . 61.
... the retina is always referred directly outward at a right angle to the point impressed , and therefore to the opposite side of the field of view . These colored spectra have been called phosphenes . Observe , 6 SPACE PERCEPTION . 61.
Página 70
... angles , or nearly at right angles , to the impressed surface , and therefore upward ; and radiants below the horizon , on the ground , impress the upper half of the retina and are referred downward . Comparison with Other Senses ...
... angles , or nearly at right angles , to the impressed surface , and therefore upward ; and radiants below the horizon , on the ground , impress the upper half of the retina and are referred downward . Comparison with Other Senses ...
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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