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 cornea corresponding points cross depth of space distance distant objects distinct divergence double images evident exactly Experiment external images farther fibers field of view gaze Helmholtz heteronymous homonymous horizontal horopter horopteric line identical points Illustrations impression inches inclination interocular space inverted jects law of corresponding left eye left-eye image lens light line of sight look median line middle monocular motion muscles naked eyes nearer nose oblique observer ocular optic axes optic centers optic chiasm optic convergence optic nerve outward parallel perceived perception perfect image perfectly point of sight position projection pupil ray-lines rays refractive represent retina retinal images right and left right eye right-eye image rotation sclerotic screen seen single shut side stereoscope surface tion torsion turn the eyes vergence vertical meridian vibrations visual lines visual result