Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
Dentro del libro
Resultados 1-5 de 30
Página 32
... shut out , and when the light is feeble , a larger portion may be admitted . optical instruments this is done by means of diaphragms . In the camera we have brass caps with holes of various sizes , which may be changed and adapted to ...
... shut out , and when the light is feeble , a larger portion may be admitted . optical instruments this is done by means of diaphragms . In the camera we have brass caps with holes of various sizes , which may be changed and adapted to ...
Página 33
... shut out . When the light diminishes , as in twilight , the circular fibers relax , the previously stretched radi- ating fibers contract by elasticity , and enlarge the pupil . At night the pupil enlarges still more , in order to let in ...
... shut out . When the light diminishes , as in twilight , the circular fibers relax , the previously stretched radi- ating fibers contract by elasticity , and enlarge the pupil . At night the pupil enlarges still more , in order to let in ...
Página 62
... Shutting the left , hold the can- dle very near the right eye , within three or four inches , obliquely outward and for- ward , so that the light shall strongly illuminate the retina . Now move the light about gently , upward. INTERNAL ...
... Shutting the left , hold the can- dle very near the right eye , within three or four inches , obliquely outward and for- ward , so that the light shall strongly illuminate the retina . Now move the light about gently , upward. INTERNAL ...
Página 63
... shut ; but then being projected on a dark ground , the color is apt to be complementary to that of the same spectrum seen against the bright ground of the sky . It is first blue , then yellow , then green , and so fades . The explana ...
... shut ; but then being projected on a dark ground , the color is apt to be complementary to that of the same spectrum seen against the bright ground of the sky . It is first blue , then yellow , then green , and so fades . The explana ...
Página 64
... shutting the eyes , the spectrum is first bright yellow , with deep - red border and dark olive - green corona ; then it becomes greenish- yellow , and then green with red border , then red with indigo border , and so fades away . With ...
... shutting the eyes , the spectrum is first bright yellow , with deep - red border and dark olive - green corona ; then it becomes greenish- yellow , and then green with red border , then red with indigo border , and so fades away . With ...
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