Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
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Página 18
... course is practically impossible ) , it would be easy to make a glass instrument which , put into the concavity , would pro- duce sight as perfect as , perhaps more perfect than , the natural eye . Conditions of a Perfect Image . - A ...
... course is practically impossible ) , it would be easy to make a glass instrument which , put into the concavity , would pro- duce sight as perfect as , perhaps more perfect than , the natural eye . Conditions of a Perfect Image . - A ...
Página 33
... course in proportion to the intensity of the light . If , therefore , strong sunlight impresses the retina , the circular fibers immediately contract , the pupil becomes small , and a large portion of the light is shut out . When the ...
... course in proportion to the intensity of the light . If , therefore , strong sunlight impresses the retina , the circular fibers immediately contract , the pupil becomes small , and a large portion of the light is shut out . When the ...
Página 37
... course there is a fourth image , viz . , that on the retina and which determines sight . The three images here spoken of are by reflection and have nothing to do with sight . The retinal image is by refraction , and we are not here ...
... course there is a fourth image , viz . , that on the retina and which determines sight . The three images here spoken of are by reflection and have nothing to do with sight . The retinal image is by refraction , and we are not here ...
Página 54
... course , no other layer can exist except the fibrous layer . In the central spot the fibrous layer is wholly wanting , and the granular and nuclear layer is almost wanting , so that the retina is here almost reduced to the bacillary ...
... course , no other layer can exist except the fibrous layer . In the central spot the fibrous layer is wholly wanting , and the granular and nuclear layer is almost wanting , so that the retina is here almost reduced to the bacillary ...
Página 59
... course of a sensory fiber is referred to its periph- eral extremity . Thus , if the sciatic nerve be laid bare in the upper thigh and then pinched , the pain is felt not at the part injured but at the termination of the nerve in the ...
... course of a sensory fiber is referred to its periph- eral extremity . Thus , if the sciatic nerve be laid bare in the upper thigh and then pinched , the pain is felt not at the part injured but at the termination of the nerve in the ...
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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