Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 17
... inch in diameter . The socket in which it is set is not a hollow sphere , but an irregular hollow cone or pyramid . Evidently , therefore , the deeper and smaller parts of the hollow must be filled with something else . It is filled ...
... inch in diameter . The socket in which it is set is not a hollow sphere , but an irregular hollow cone or pyramid . Evidently , therefore , the deeper and smaller parts of the hollow must be filled with something else . It is filled ...
Página 23
... inch in diameter , and one sixth of an inch in thickness , firm enough to handle easily , but elastic and easily yielding to pressure . On section it is found to consist of layers , increasing in density from surface to center , as ...
... inch in diameter , and one sixth of an inch in thickness , firm enough to handle easily , but elastic and easily yielding to pressure . On section it is found to consist of layers , increasing in density from surface to center , as ...
Página 27
... inches in diameter ; cover the hole with an opaque plate of sheet iron , in which there is a very small hole , one tenth to one twentieth of an inch in diameter . If , now , a sheet of white paper be held a little way from the small ...
... inches in diameter ; cover the hole with an opaque plate of sheet iron , in which there is a very small hole , one tenth to one twentieth of an inch in diameter . If , now , a sheet of white paper be held a little way from the small ...
Página 39
... inch wide . When they contract , they draw up the pupil , like a string about the mouth of a bag , and make it small ( Fig . 15 , A ) . We may regard the radiating fibers as elastic , and as contracting passively by elasticity when ...
... inch wide . When they contract , they draw up the pupil , like a string about the mouth of a bag , and make it small ( Fig . 15 , A ) . We may regard the radiating fibers as elastic , and as contracting passively by elasticity when ...
Página 44
... finitely distant objects . By change of the form of the lens , it can adjust itself to all distances up to about five * " Optique Physiologique , " p . 150 . inches . The range of adjustment or of distinct vision 44 MONOCULAR VISION .
... finitely distant objects . By change of the form of the lens , it can adjust itself to all distances up to about five * " Optique Physiologique , " p . 150 . inches . The range of adjustment or of distinct vision 44 MONOCULAR VISION .
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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