Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
Dentro del libro
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Página 47
... lines , a horizontal and a vertical , which are shorter or longer , and at a less or greater dis- tance apart , according to the degree of astigmatism . A slight astigmatism is very common , and often exists un- known to the subject ...
... lines , a horizontal and a vertical , which are shorter or longer , and at a less or greater dis- tance apart , according to the degree of astigmatism . A slight astigmatism is very common , and often exists un- known to the subject ...
Página 49
... line very indistinct . At the distance ƒ ' , on the con- trary , there is no horizontal blurring , but only vertical . The vertical line therefore would be very distinct , and the horizontal indistinct . At f " , the two lines are seen ...
... line very indistinct . At the distance ƒ ' , on the con- trary , there is no horizontal blurring , but only vertical . The vertical line therefore would be very distinct , and the horizontal indistinct . At f " , the two lines are seen ...
Página 95
... line n n represents the extent of the visible spectrum . The places of the spectral colors are represented by the vertical lines from the letters R , Or , Y , Gr , Bl , V. The vertically lined space represents the affections of the red ...
... line n n represents the extent of the visible spectrum . The places of the spectral colors are represented by the vertical lines from the letters R , Or , Y , Gr , Bl , V. The vertically lined space represents the affections of the red ...
Página 112
... vertical lines ( vertical meridians ) , a b , a ' b ' , through the central spots , so as to divide the retina into two equal halves , then the right or shaded halves would correspond point for point , and the left or unshaded halves ...
... vertical lines ( vertical meridians ) , a b , a ' b ' , through the central spots , so as to divide the retina into two equal halves , then the right or shaded halves would correspond point for point , and the left or unshaded halves ...
Página 113
... lines of latitude and longitude of a globe , ab and ay being the meridian and equator , then points of similar ... vertical meridians , ab , a ' b ' , at equal distances from the central spots , will be corresponding ; also points ...
... lines of latitude and longitude of a globe , ab and ay being the meridian and equator , then points of similar ... vertical meridians , ab , a ' b ' , at equal distances from the central spots , will be corresponding ; also points ...
Otras ediciones - Ver todas
Sight: An Exposition of the Principles of Moonocular and Binocular Vision Joseph Le Conte Sin vista previa disponible - 2017 |
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