Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
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Página xvi
... Extreme interest of the subject . 303 . 1. INVERTEBRATE EYE : General sensibility to light , 303 ; coex- tensive with life , 303 ; this not special sense , 303 ; first be- ginnings of special sense determined by light itself , 303 ...
... Extreme interest of the subject . 303 . 1. INVERTEBRATE EYE : General sensibility to light , 303 ; coex- tensive with life , 303 ; this not special sense , 303 ; first be- ginnings of special sense determined by light itself , 303 ...
Página 5
... extreme rapidity of the vibration of a ray of light . The following illustration may help : The average or green ray vibrates about 600,000,000,000,000 times in a second . If t repre- sents the time of one vibration , then t : 1 scc ...
... extreme rapidity of the vibration of a ray of light . The following illustration may help : The average or green ray vibrates about 600,000,000,000,000 times in a second . If t repre- sents the time of one vibration , then t : 1 scc ...
Página 29
... extreme colors , red and violet . * But the degree of chromatism is so small as not to interfere at all with the accuracy of vision . 4. Aberration . - Another defect , much more diffi- cult to correct , is aberration . The form of lens ...
... extreme colors , red and violet . * But the degree of chromatism is so small as not to interfere at all with the accuracy of vision . 4. Aberration . - Another defect , much more diffi- cult to correct , is aberration . The form of lens ...
Página 46
... extreme old age , when the tissues begin to break down , it is probable that some flattening of the eye may take place . To such persons it would be necessary to wear weak convex glasses , even for distant objects . But this is not ...
... extreme old age , when the tissues begin to break down , it is probable that some flattening of the eye may take place . To such persons it would be necessary to wear weak convex glasses , even for distant objects . But this is not ...
Página 47
... extreme . 2. In a cylin- drical lens , in which there is no curvature at all in one direction , the emergent beam will be a wedge , ɛec- tions of which will be a parallelogram becoming nar- rower and narrower until it becomes a focal ...
... extreme . 2. In a cylin- drical lens , in which there is no curvature at all in one direction , the emergent beam will be a wedge , ɛec- tions of which will be a parallelogram becoming nar- rower and narrower until it becomes a focal ...
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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