Sight: An Exposition of the Principles of Monocular and Binocular VisionKegan Paul, 1881 - 307 páginas |
Dentro del libro
Resultados 1-5 de 22
Página 22
... observer looks through the pupil into the dark interior of the ball . The function of the pupil is to admit , and at the same time regulate the amount of , light . 4. Linings . Thus much is visible to the naked eye without dissection ...
... observer looks through the pupil into the dark interior of the ball . The function of the pupil is to admit , and at the same time regulate the amount of , light . 4. Linings . Thus much is visible to the naked eye without dissection ...
Página 42
... observer ; c , section of candle flame ; f , a distant point of sight , and n a near point of sight . ( After Helmholtz . ) the patient , A , with a lighted candle in his hand , a little to one side , as in Fig . 17 , C , while his own ...
... observer ; c , section of candle flame ; f , a distant point of sight , and n a near point of sight . ( After Helmholtz . ) the patient , A , with a lighted candle in his hand , a little to one side , as in Fig . 17 , C , while his own ...
Página 82
... observer . But it will be objected that even with one eye we see no pecu- liar spot on a white wall . I therefore add : 2. That we see distinctly only a very small area about the point of sight , and distinctness decreases rapidly in ...
... observer . But it will be objected that even with one eye we see no pecu- liar spot on a white wall . I therefore add : 2. That we see distinctly only a very small area about the point of sight , and distinctness decreases rapidly in ...
Página 101
... observers differ . Some have made it a plane , some a spherical surface . Some , by purely geometrical methods , have given it the most curious forms and properties ; while others , by purely experimental methods , have come to the ...
... observers differ . Some have made it a plane , some a spherical surface . Some , by purely geometrical methods , have given it the most curious forms and properties ; while others , by purely experimental methods , have come to the ...
Página 111
... observer - for ex- ample , a card and a rod , or two rods . Then , while looking at the table on which the objects lie , hold up the forefinger - or better , a pencil - between the eyes and the objects . The pencil will of course be ...
... observer - for ex- ample , a card and a rod , or two rods . Then , while looking at the table on which the objects lie , hold up the forefinger - or better , a pencil - between the eyes and the objects . The pencil will of course be ...
Otras ediciones - Ver todas
Términos y frases comunes
angle 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 depth of space distant objects distinct double images evident exactly Experiment external images farther Fcap fibers field of view focal adjustment foreground forms of perspective Frontispiece heteronymously horizontal horopter identical points Illustrations impression inches inclination interocular space jects judgments Large post 8vo left eye lens light line of sight look median plane monocular motion muscles naked eyes nearer nose object or scene observer ocular optic axes optic chiasm optic convergence optic nerve outward parallel perception of depth perfectly Poems point of sight position projection represent retina retinal images right and left right eye rotation screen Second Edition seen single side Small crown 8vo stereoscope stereoscopic pictures Third Edition tion torsion turn the eyes visual lines visual result vols
Pasajes populares
Página 13 - MOCKLER, E. — A Grammar of the Baloochee Language, as it is spoken in Makran (Ancient Gedrosia), in the Persia-Arabic and Roman characters.
Página 7 - Current Coin. Materialism — The Devil — Crime — Drunkenness — , Pauperism — Emotion — Recreation — The Sabbath. Third Edition. Crown 8vo. Cloth, price 6s. Speech in Season. Fourth Edition. Crown 8vo. Cloth, price o$.
Página 9 - XVIII. The Nature of Light: With a General Account of Physical Optics.
Página 26 - MANS (Eliza A.). An Essay on the Culture of the Observing Powers of Children, especially in connection with the Study of Botany. Edited, with Notes and a Supplement, by Joseph Payne, FCP, Author of " Lectures on the Science and Art of Education,
Página 15 - Frank, FRGS— Matabele Land and the Victoria Falls. A Naturalist's Wanderings in the Interior of South Africa. Edited by CG GATES, BA With numerous Illustrations and 4 Maps.
Página 10 - Joseph.— Free Trade in Land. Edited by his Widow. With Preface by the Right Hon.
Página 1 - Phantasmion. A Fairy Tale. With an Introductory Preface by the Right Hon. Lord Coleridge, of Ottery St. Mary. A New Edition. Illustrated. Crown 8vo. Cloth, price js. 6d. Memoir and Letters of Sara Coleridge. Edited by her Daughter. With Index. 2 vols. With Two Portraits. Third Edition, Revised and Corrected. Crown 8vo. Cloth, price 24$.