Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
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Página 36
... fore , the object approaches nearer the lens ( as it does in higher magnification ) , we change the lens so as to throw the image to the same place . How is this managed in the eye ? It was long be- lieved that the adjustment was on the ...
... fore , the object approaches nearer the lens ( as it does in higher magnification ) , we change the lens so as to throw the image to the same place . How is this managed in the eye ? It was long be- lieved that the adjustment was on the ...
Página 43
... fore , while young , should habitually wear slightly con- vex glasses , which make their eyes normal . When they grow old they are compelled to have two pairs of glasses , one for distant objects and one for near ob- jects ; one for ...
... fore , while young , should habitually wear slightly con- vex glasses , which make their eyes normal . When they grow old they are compelled to have two pairs of glasses , one for distant objects and one for near ob- jects ; one for ...
Página 44
... fore , that the myopic eye may be expected to become normal with age . Now this view of the nature of presbyopy is wholly wrong . The presbyopic eye sees distant objects per- fectly well , and precisely like the normal eye . Its pas ...
... fore , that the myopic eye may be expected to become normal with age . Now this view of the nature of presbyopy is wholly wrong . The presbyopic eye sees distant objects per- fectly well , and precisely like the normal eye . Its pas ...
Página 77
... fore more numerous , than elsewhere ; being here , as already seen ( page 55 ) , only obo to Too of an inch in diameter . Function of the Central Spot . - Every point on the retina , as already seen , has its correspondent or repre ...
... fore more numerous , than elsewhere ; being here , as already seen ( page 55 ) , only obo to Too of an inch in diameter . Function of the Central Spot . - Every point on the retina , as already seen , has its correspondent or repre ...
Página 79
... , however , in which periscopism is so important , this structure of the lens subserves both purposes . So far as this property is concerned , there- fore , the structure in man may be regarded as SPACE PERCEPTION . 79.
... , however , in which periscopism is so important , this structure of the lens subserves both purposes . So far as this property is concerned , there- fore , the structure in man may be regarded as SPACE PERCEPTION . 79.
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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