Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
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Página xiv
... vertical meridian , 219 ; experiments to test its truth , 220 ; adverse conclusion as to Helmholtz's results , 223 ; Meissner's results and his experiments , 225 ; my results confirm Meissner's , 227 ; experiments proving , 227-231 ...
... vertical meridian , 219 ; experiments to test its truth , 220 ; adverse conclusion as to Helmholtz's results , 223 ; Meissner's results and his experiments , 225 ; my results confirm Meissner's , 227 ; experiments proving , 227-231 ...
Página 47
... vertical curvature - the curvature is ellipsoid , with long diameter at right 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 ...
... vertical curvature - the curvature is ellipsoid , with long diameter at right 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 ...
Página 48
... vertical and a horizontal . Supposing the vertical curvature the greatest ( the most usual case ) , the vertical plane of rays a b will meet and cross at f ( Fig . 21 , A ) , while those of the horizontal plane c d will meet at some ...
... vertical and a horizontal . Supposing the vertical curvature the greatest ( the most usual case ) , the vertical plane of rays a b will meet and cross at f ( Fig . 21 , A ) , while those of the horizontal plane c d will meet at some ...
Página 49
... vertical . The vertical line therefore would be very distinct , and the horizontal indistinct . At f " , the two lines are seen equally well , but neither of them quite distinctly . The Remedy . In a general way we may say that the ...
... vertical . The vertical line therefore would be very distinct , and the horizontal indistinct . At f " , the two lines are seen equally well , but neither of them quite distinctly . The Remedy . In a general way we may say that the ...
Página 75
... vertically and convex hori- zontally . Now , the rays from the light ( L , Fig . 29 ) which penetrate the center of the pupil will pass directly on with- out refraction except what is normal , and make its image ( Fig . 30 , L ' ) on ...
... vertically and convex hori- zontally . Now , the rays from the light ( L , Fig . 29 ) which penetrate the center of the pupil will pass directly on with- out refraction except what is normal , and make its image ( Fig . 30 , L ' ) on ...
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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