Sight: An Exposition of the Principles of Monocular and Binocular VisionKegan Paul, 1881 - 275 páginas |
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Página 22
... observer looks through the pupil into the dark interior of the ball . The function of the pupil is to admit , and at the same time regulate the amount of , light . 4. Linings . Thus much is visible to the naked eye without dissection ...
... observer looks through the pupil into the dark interior of the ball . The function of the pupil is to admit , and at the same time regulate the amount of , light . 4. Linings . Thus much is visible to the naked eye without dissection ...
Página 42
... observer ; c , section of candle flame ; f , a distant point of sight , and n a near point of sight . ( After Helmholtz . ) the patient , A , with a lighted candle in his hand , a little to one side , as in Fig . 17 , C , while his own ...
... observer ; c , section of candle flame ; f , a distant point of sight , and n a near point of sight . ( After Helmholtz . ) the patient , A , with a lighted candle in his hand , a little to one side , as in Fig . 17 , C , while his own ...
Página 82
... observer . But it will be objected that even with one eye we see no pecu- liar spot on a white wall . I therefore add : 2. That we see distinctly only a very small area about the point of sight , and distinctness decreases rapidly in ...
... observer . But it will be objected that even with one eye we see no pecu- liar spot on a white wall . I therefore add : 2. That we see distinctly only a very small area about the point of sight , and distinctness decreases rapidly in ...
Página 101
... observers differ . Some have made it a plane , some a spherical surface . Some , by purely geometrical methods , have given it the most curious forms and properties ; while others , by purely experimental methods , have come to the ...
... observers differ . Some have made it a plane , some a spherical surface . Some , by purely geometrical methods , have given it the most curious forms and properties ; while others , by purely experimental methods , have come to the ...
Página 111
... observer - for ex- ample , a card and a rod , or two rods . Then , while looking at the table on which the objects lie , hold up the forefinger - or better , a pencil - between the eyes and the objects . The pencil will of course be ...
... observer - for ex- ample , a card and a rod , or two rods . Then , while looking at the table on which the objects lie , hold up the forefinger - or better , a pencil - between the eyes and the objects . The pencil will of course be ...
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Términos y frases comunes
angle axis bacillary layer binocular eye binocular perspective binocular vision camera central spot Cheaper Edition ciliary muscle Cloth colors combined images cones corresponding points cross Demy 8vo diagram direction distance distant objects distinct divergence double images evident Experiment external images farther Fcap fibers field of view Frontispiece Helmholtz heteronymous horizontal horopter horopteric line Illustrations impression inches inclination interocular space jects Large post 8vo left eye left-eye image lens light line of sight look median line monocular motion muscles nearer nose observer ocular optic axes optic centers optic chiasm optic nerve outward parallel perception perfectly phenomena plane Poems point of sight Portrait position price 75 Prof projection rays refractive represent retina retinal images right eye rotation sclerotic screen Second Edition seen single Small crown 8vo stereoscope surface T. H. HUXLEY Third Edition tion torsion Translated vertical meridian vibrations visual lines visual result vols
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