Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
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Página 41
... objects at all these distances . This is called its range of distinct vision ... distant landscape , but can by drawing the tube be adjusted to shorter and ... distant objects . Its focus for distant objects ( focus of parallel rays ) is ...
... objects at all these distances . This is called its range of distinct vision ... distant landscape , but can by drawing the tube be adjusted to shorter and ... distant objects . Its focus for distant objects ( focus of parallel rays ) is ...
Página 42
... distant objects , and which , therefore , when shortened to the greatest degree , is still too long in the chamber for distant objects , but is adapted only for near objects within a certain limited range . It is evident , then , that ...
... distant objects , and which , therefore , when shortened to the greatest degree , is still too long in the chamber for distant objects , but is adapted only for near objects within a certain limited range . It is evident , then , that ...
Página 43
... distant objects ; but the near limit of its range of adjustment is somewhat farther off than in the normal . When , however , the hypermetropic eye loses its power of adjustment with age , then even distant objects can not be seen ...
... distant objects ; but the near limit of its range of adjustment is somewhat farther off than in the normal . When , however , the hypermetropic eye loses its power of adjustment with age , then even distant objects can not be seen ...
Página 44
... distant objects per- fectly well , and precisely like the normal eye . Its pas- sive structure is therefore unaltered . It makes a per- fect image of distant objects on the retina , like the normal eye . Its focus of parallel rays is on ...
... distant objects per- fectly well , and precisely like the normal eye . Its pas- sive structure is therefore unaltered . It makes a per- fect image of distant objects on the retina , like the normal eye . Its focus of parallel rays is on ...
Página 45
... objects , it uses glasses ; in looking at distant objects , the glasses are removed . Myopy is a structural defect ; presbyopy is a functional defect . One is a defect of prearrangement of the instrument ; the other is a loss of power ...
... objects , it uses glasses ; in looking at distant objects , the glasses are removed . Myopy is a structural defect ; presbyopy is a functional defect . One is a defect of prearrangement of the instrument ; the other is a loss of power ...
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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