Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
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Página 33
... side , and thus enlarge it ( Fig . 15 , B ) . The circular fibers are concentric with the pupil , and are especially numerous and strong near the margin , forming there a band about one - twentieth of an inch wide . When they contract ...
... side , and thus enlarge it ( Fig . 15 , B ) . The circular fibers are concentric with the pupil , and are especially numerous and strong near the margin , forming there a band about one - twentieth of an inch wide . When they contract ...
Página 35
... side recedes from the lens . As the object recedes , the image approaches the lens . There- fore there must be an adjustment of the instrument for. DIAGRAM SHOWING THE FORMATION OF A LENS IMAGE . THE EYE AS AN OPTICAL INSTRUMENT . 35.
... side recedes from the lens . As the object recedes , the image approaches the lens . There- fore there must be an adjustment of the instrument for. DIAGRAM SHOWING THE FORMATION OF A LENS IMAGE . THE EYE AS AN OPTICAL INSTRUMENT . 35.
Página 37
... side , as in Fig . 18 , C , while his own point FIG . 18 . B n A , eye observed ; B. eye of observer ; c , section of candle - flame ; f , a distant point of sight , and n a near point of sight . ( After Helmholtz . ) FIG . 19 . of ...
... side , as in Fig . 18 , C , while his own point FIG . 18 . B n A , eye observed ; B. eye of observer ; c , section of candle - flame ; f , a distant point of sight , and n a near point of sight . ( After Helmholtz . ) FIG . 19 . of ...
Página 38
... side , N , is adapted to near objects ; the left , F , to distant objects . Theory of Adjustment . — It is certain that in adjust- ing the eye for looking at very near objects , the lens becomes more convex . But the question , " How is ...
... side , N , is adapted to near objects ; the left , F , to distant objects . Theory of Adjustment . — It is certain that in adjust- ing the eye for looking at very near objects , the lens becomes more convex . But the question , " How is ...
Página 59
... and toes . If the ulnar nerve be pinched in the hollow on the inner side of the point of the elbow , pain is felt in the little and ring fingers , where this nerve is distributed . In amputated legs , SPACE PERCEPTION . 59.
... and toes . If the ulnar nerve be pinched in the hollow on the inner side of the point of the elbow , pain is felt in the little and ring fingers , where this nerve is distributed . In amputated legs , SPACE PERCEPTION . 59.
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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