Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 41
... jects , and shorten it for more distant . In the micro- scope , on the contrary , the image is usually thrown to the same place in the upper part of the tube . If , there- fore , the object approaches nearer the lens ( as it does in ...
... jects , and shorten it for more distant . In the micro- scope , on the contrary , the image is usually thrown to the same place in the upper part of the tube . If , there- fore , the object approaches nearer the lens ( as it does in ...
Página 48
... jects , but is adapted only for near objects within a cer- tain limited range . It is evident , then , that , the defect of the myopic eye being too great refractive power of the lens in a passive state , this defect may be remedied by ...
... jects , but is adapted only for near objects within a cer- tain limited range . It is evident , then , that , the defect of the myopic eye being too great refractive power of the lens in a passive state , this defect may be remedied by ...
Página 52
... jects , but not for near objects . Astigmatism . The form of a perfect eye is that of a spheroid of revolution about the optic axis . Its re- fraction in a horizontal and a vertical plane will be equal . This is necessary to bring all ...
... jects , but not for near objects . Astigmatism . The form of a perfect eye is that of a spheroid of revolution about the optic axis . Its re- fraction in a horizontal and a vertical plane will be equal . This is necessary to bring all ...
Página 72
... jects having no existence . It is thus that the diseased brain gives rise to delusive visual phenomena . Corresponding Points , Retinal and Spatial . - Further , it is evident that every point - every rod or cone - in the retina has its ...
... jects having no existence . It is thus that the diseased brain gives rise to delusive visual phenomena . Corresponding Points , Retinal and Spatial . - Further , it is evident that every point - every rod or cone - in the retina has its ...
Página 107
... jects seem to stand still , and the eyes or the point of sight to sweep over them . But if we move the eyes in opposite directions , as in converging the optic axes strongly and then allowing them to become again par- allel , objects ...
... jects seem to stand still , and the eyes or the point of sight to sweep over them . But if we move the eyes in opposite directions , as in converging the optic axes strongly and then allowing them to become again par- allel , objects ...
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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