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 cornea corresponding points cross depth of space distance distant objects distinct divergence double images evident exactly Experiment external images farther fibers field of view gaze Helmholtz heteronymous homonymous horizontal horopter horopteric line identical points Illustrations impression inches inclination interocular space inverted jects law of corresponding left eye left-eye image lens light line of sight look median line middle monocular motion muscles naked eyes nearer nose oblique observer ocular optic axes optic centers optic chiasm optic convergence optic nerve outward parallel perceived perception perfect image perfectly point of sight position projection pupil ray-lines rays refractive represent retina retinal images right and left right eye right-eye image rotation sclerotic screen seen single shut side stereoscope surface tion torsion turn the eyes vergence vertical meridian vibrations visual lines visual result