Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 18
... middle or equator of the globe ( Fig . 3 ) . They are called severally superior , inferior , external , and internal rectus . The first turns the ball upward , the second downward , the third to the right , and the fourth to the left ...
... middle or equator of the globe ( Fig . 3 ) . They are called severally superior , inferior , external , and internal rectus . The first turns the ball upward , the second downward , the third to the right , and the fourth to the left ...
Página 21
... . This transverse plate is not perfectly flat , but protrudes a little in the middle . In its center is a round hole , called the pupil , corresponding in position with the hole in the watch face GENERAL STRUCTURE OF THE EYE . 21.
... . This transverse plate is not perfectly flat , but protrudes a little in the middle . In its center is a round hole , called the pupil , corresponding in position with the hole in the watch face GENERAL STRUCTURE OF THE EYE . 21.
Página 37
... middle of the field of view , i . e . , nearly directly in front , are brought to a perfect focus , the rays from radiants situ- ated near the margins of the field of view , i . e . , of very oblique pencils , are not brought to a focus ...
... middle of the field of view , i . e . , nearly directly in front , are brought to a perfect focus , the rays from radiants situ- ated near the margins of the field of view , i . e . , of very oblique pencils , are not brought to a focus ...
Página 38
... middle . The circumference of the disk is immovably fixed to the sclerotic at its junction . with the cornea ; but the margin of the circular hole , or pupil , is free to move . The disk itself is composed of two sets of contractile ...
... middle . The circumference of the disk is immovably fixed to the sclerotic at its junction . with the cornea ; but the margin of the circular hole , or pupil , is free to move . The disk itself is composed of two sets of contractile ...
Página 39
... plan . It is com- posed of many very thin metallic plates , partly covering each other , so arranged as to leave a polygonal hole in the middle , and sliding over each other in such THE EYE AS AN OPTICAL INSTRUMENT , 39.
... plan . It is com- posed of many very thin metallic plates , partly covering each other , so arranged as to leave a polygonal hole in the middle , and sliding over each other in such THE EYE AS AN OPTICAL INSTRUMENT , 39.
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Términos y frases comunes
angle axis bacillary layer binocular eye binocular perspective binocular vision camera central spot ciliary muscle circle colors combined images cones corresponding points cross depth of space distant objects distinct double images evident exactly Experiment external images eyes by squinting farther fibers field of view figures finger focal adjustment foreground forms of perspective gaze heteronymously homonymously horizontal horopter identical points impression inches inclination interocular space inverted jects left eye lens less convergence light line of sight look median plane monocular images motion muscles naked eyes nearer nose object or scene oblique observer ocular optic axes optic chiasm optic convergence optic nerve outward parallel perceived perception of depth perfect image perfectly point of sight position projection rays refractive represent retina retinal images right and left right eye rotation sclerotic screen seen single side stereoscope stereoscopic pictures surface tion torsion turn the eyes unite visual lines visual result