Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 26
... seen that rays from widely different points in the object mix with each other on the receiv- ing screen ; much more , then , would rays from contigu- ous points of the object mix . In such a case , the mixing is so great that no ...
... seen that rays from widely different points in the object mix with each other on the receiv- ing screen ; much more , then , would rays from contigu- ous points of the object mix . In such a case , the mixing is so great that no ...
Página 29
... seen in the living eye by means of the ophthalmoscope . By reference to the diagram , Fig . 8 , it is seen that the central rays from all radiants cross each other in the lens . This point of ray - crossing is called the nodal point ...
... seen in the living eye by means of the ophthalmoscope . By reference to the diagram , Fig . 8 , it is seen that the central rays from all radiants cross each other in the lens . This point of ray - crossing is called the nodal point ...
Página 35
... seen by good eyes . By close observation and refined methods , it has been recently shown that the chromatism of the eye is not perfectly corrected . It can be observed if we use only the extreme colors , red and violet . * But the ...
... seen by good eyes . By close observation and refined methods , it has been recently shown that the chromatism of the eye is not perfectly corrected . It can be observed if we use only the extreme colors , red and violet . * But the ...
Página 40
... seen that a lens , properly corrected for chromatism and aberration , makes a perfect image . But the plate or screen which receives the image and makes it visible must be placed exactly in the right place , i . e . , in the focus ...
... seen that a lens , properly corrected for chromatism and aberration , makes a perfect image . But the plate or screen which receives the image and makes it visible must be placed exactly in the right place , i . e . , in the focus ...
Página 51
... distant objects can not be seen distinctly . Such persons , therefore , while young , should habitually wear slightly convex glasses , which make their eyes normal . When they grow old DEFECTS OF THE EYE AS AN INSTRUMENT . 51.
... distant objects can not be seen distinctly . Such persons , therefore , while young , should habitually wear slightly convex glasses , which make their eyes normal . When they grow old DEFECTS OF THE EYE AS AN INSTRUMENT . 51.
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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