Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
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Página 9
... inch in diameter . The socket in which it is set is not a hollow sphere , but an irregu- lar 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 irregu- lar hollow cone or pyramid . Evidently , therefore , the deeper and smaller parts of the hollow must be filled . with something else . It is filled ...
Página 16
... 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 shown in ...
... 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 shown in ...
Página 20
... 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 hole ...
... 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 hole ...
Página 23
... inch ( 15 mm . ) in front of the retina . The size of the retinal image is as much smaller than the object as the former is nearer to the nodal point than the latter , and therefore for distant objects it must be extremely minute ...
... inch ( 15 mm . ) in front of the retina . The size of the retinal image is as much smaller than the object as the former is nearer to the nodal point than the latter , and therefore for distant objects it must be extremely minute ...
Página 33
... 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 ...
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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