Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 20
... perfect globe , except that the front part is more protuberant ( Fig . 4 ) . 1. The outer investing coat , except the small pro- tuberant front part , is a strong , thick , fibrous membrane of a porcelain - white color , called the ...
... perfect globe , except that the front part is more protuberant ( Fig . 4 ) . 1. The outer investing coat , except the small pro- tuberant front part , is a strong , thick , fibrous membrane of a porcelain - white color , called the ...
Página 23
... slightly flattens it . We shall see the importance of this when we come to speak of the adjustment of the eye for distance . The perfect transparency of the lens is obviously necessary for. 2 GENERAL STRUCTURE OF THE EYE . 23.
... slightly flattens it . We shall see the importance of this when we come to speak of the adjustment of the eye for distance . The perfect transparency of the lens is obviously necessary for. 2 GENERAL STRUCTURE OF THE EYE . 23.
Página 24
Joseph LeConte. The perfect transparency of the lens is obviously necessary for distinct vision ; cataract , a common cause of blindness , arises from its opacity . The lens , with its continuing curtain , completely divides the interior ...
Joseph LeConte. The perfect transparency of the lens is obviously necessary for distinct vision ; cataract , a common cause of blindness , arises from its opacity . The lens , with its continuing curtain , completely divides the interior ...
Página 25
... perfect image on the retina . With- out images we would perceive light , but not objects ; and distinctness of objects is exactly proportioned to distinctness of retinal images . If the image of an ob- ject is distinct , the object will ...
... perfect image on the retina . With- out images we would perceive light , but not objects ; and distinctness of objects is exactly proportioned to distinctness of retinal images . If the image of an ob- ject is distinct , the object will ...
Página 29
... perfect image of the object painted on the retina . This fundamental fact may be proved in many ways by observations on the dead eye : 1. If the eye of an ox be taken from the socket , and the sclerotic carefully removed , so that the ...
... perfect image of the object painted on the retina . This fundamental fact may be proved in many ways by observations on the dead eye : 1. If the eye of an ox be taken from the socket , and the sclerotic carefully removed , so that the ...
Términos y frases comunes
angle animals axis bacillary layer binocular eye binocular perspective binocular vision camera central spot ciliary muscle circle Cloth colors combined images cones 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 left eye left-eye image lens light line of sight look median line monocular motion muscles naked eyes natural 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 ray-lines rays refractive represent retina retinal images right and left right eye rotation sclerotic screen seen single shut side Sociology stereoscope surface T. H. HUXLEY tion torsion vertical meridian vibrations visual lines visual result vols
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