Sight: An Exposition of the Principles of Monocular and Binocular VisionKegan Paul, 1881 - 275 páginas |
Dentro del libro
Resultados 1-5 de 45
Página 35
... nearer . In Fig . 12 the marginal rays , a r ' , a r ' , are brought to a focus at a " , while the central rays , a r , a r , are brought to a focus at a ' . The best place for the receiving screen would be at S S , between these ; but ...
... nearer . In Fig . 12 the marginal rays , a r ' , a r ' , are brought to a focus at a " , while the central rays , a r , a r , are brought to a focus at a ' . The best place for the receiving screen would be at S S , between these ; but ...
Página 41
... nearer , we draw out the tube so as to carry the ground - glass plate a little farther back ; when the object recedes , we slide up the tube so as to bring the receiving plate nearer the lens . So in the opera - glass we elongate the ...
... nearer , we draw out the tube so as to carry the ground - glass plate a little farther back ; when the object recedes , we slide up the tube so as to bring the receiving plate nearer the lens . So in the opera - glass we elongate the ...
Página 47
... nearer objects , a voluntary effort is necessary to throw the image on the retina , which effort is greater as the object is nearer , until it is limited at the distance of about five inches . The normal eye , therefore , is like a ...
... nearer objects , a voluntary effort is necessary to throw the image on the retina , which effort is greater as the object is nearer , until it is limited at the distance of about five inches . The normal eye , therefore , is like a ...
Página 48
... nearer distances , and becomes in all respects a normal eye . From the nature of the defect ( structural defect ) , it is evident that the glasses must be worn habit- ually . Presbyopy , or Old - Sightedness . - This defect is often ...
... nearer distances , and becomes in all respects a normal eye . From the nature of the defect ( structural defect ) , it is evident that the glasses must be worn habit- ually . Presbyopy , or Old - Sightedness . - This defect is often ...
Página 50
... nearer and a farther limit ; in the nor- mal eye it is between five inches , near limit , and infinite distance , the farther limit ( if limit it can be called ) ; in the myopic eye the nearer limit may be two inches , the farther limit ...
... nearer and a farther limit ; in the nor- mal eye it is between five inches , near limit , and infinite distance , the farther limit ( if limit it can be called ) ; in the myopic eye the nearer limit may be two inches , the farther limit ...
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Términos y frases comunes
angle axis bacillary layer binocular eye binocular perspective binocular vision camera central spot Cheaper Edition ciliary muscle Cloth colors combined images cones corresponding points cross Demy 8vo diagram direction distance distant objects distinct divergence double images evident Experiment external images farther Fcap fibers field of view Frontispiece Helmholtz heteronymous horizontal horopter horopteric line Illustrations impression inches inclination interocular space jects Large post 8vo left eye left-eye image lens light line of sight look median line monocular motion muscles nearer nose observer ocular optic axes optic centers optic chiasm optic nerve outward parallel perception perfectly phenomena plane Poems point of sight Portrait position price 75 Prof projection rays refractive represent retina retinal images right eye rotation sclerotic screen Second Edition seen single Small crown 8vo stereoscope surface T. H. HUXLEY Third Edition tion torsion Translated vertical meridian vibrations visual lines visual result vols
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