Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 7
... PARALLEL MOTION : Listing's law , 164 ; experiments illustrating , 164-172 ; the statement of the laws , 173 ; contrary statement by Helmholtz explained , 175 ; rota- tion on optic axes in parallel motion only apparent , 176 . SECTION ...
... PARALLEL MOTION : Listing's law , 164 ; experiments illustrating , 164-172 ; the statement of the laws , 173 ; contrary statement by Helmholtz explained , 175 ; rota- tion on optic axes in parallel motion only apparent , 176 . SECTION ...
Página 47
... parallel rays in a passive state is on the retina . For all nearer objects , a voluntary effort is necessary to throw the image on the retina , which effort is greater as the object is nearer , until it is limited at the distance of ...
... parallel rays in a passive state is on the retina . For all nearer objects , a voluntary effort is necessary to throw the image on the retina , which effort is greater as the object is nearer , until it is limited at the distance of ...
Página 48
... this is supposed to be a too small refrac- tive power in the same condition . As the myopic eye throws the focus of parallel rays in front of the retina , so it is supposed the presbyopic eye throws the focus 48 MONOCULAR VISION .
... this is supposed to be a too small refrac- tive power in the same condition . As the myopic eye throws the focus of parallel rays in front of the retina , so it is supposed the presbyopic eye throws the focus 48 MONOCULAR VISION .
Página 49
... parallel rays behind the retina , because the retina is too near the lens , at S ' S ' , Fig . 7 , page 27. It is further supposed that the change which takes place with age is a flattening , and therefore a loss of refractive power ...
... parallel rays behind the retina , because the retina is too near the lens , at S ' S ' , Fig . 7 , page 27. It is further supposed that the change which takes place with age is a flattening , and therefore a loss of refractive power ...
Página 51
... parallel rays is behind the retina in a passive state of the eye . The hyper- metropic eye when young usually sees well at a distance , but not near at hand , and therefore it is apt to be con- founded with presbyopy . The reason is ...
... parallel rays is behind the retina in a passive state of the eye . The hyper- metropic eye when young usually sees well at a distance , but not near at hand , and therefore it is apt to be con- founded with presbyopy . The reason is ...
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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