Author:
Publisher:
ISBN:
Category : American literature
Languages : en
Pages : 2132
Book Description
Books in Print
Author:
Publisher:
ISBN:
Category : American literature
Languages : en
Pages : 2132
Book Description
Publisher:
ISBN:
Category : American literature
Languages : en
Pages : 2132
Book Description
History of Ophthalmology
Author: Harold E. Henkes
Publisher: Springer Science & Business Media
ISBN: 9400906412
Category : Medical
Languages : en
Pages : 151
Book Description
When the eyeball is indented in total darkness, within less than 200 mil liseconds an oval or quarter-moon shaped spot of light is perceived in the part of the visual field corresponding to the indented region of the retina. In the seconds following, this phosphene extends across the whole visual field and alters in structure during further eyeball indentation. It is then seen as irregular large bright spots of light, finely structured moving light grains ('light nebula') and stationary bright stars. Regular geometrical patterns appear only when both eyes are indented simultaneously [1]. When the eyeball deformation is released, part of the retina again lights up for another one or two seconds and curved light lines are seen following the course of the larger retinal vessels (Fig. 1). In the following we will review the history of this phenomenon, which played an important role during the first 2200 years of vision theories and in the development of models to explain normal vision. 2. Pre-Socratic philosophers, Plato and Aristotle Alcmaeon of Croton (6-5th century B. C. ), who was a member of the Pythagoraean sect and one of the founders of Greek medicine, was the first to describe mechanical deformation of the eyeball leading to light sensa tions. According to Aristotle's pupil Theophrast of Eresos, Alcmaeon report ed that 'the eye obviously has fire within,for when the eye is struckfireflashes out' [2, p. 88].
Publisher: Springer Science & Business Media
ISBN: 9400906412
Category : Medical
Languages : en
Pages : 151
Book Description
When the eyeball is indented in total darkness, within less than 200 mil liseconds an oval or quarter-moon shaped spot of light is perceived in the part of the visual field corresponding to the indented region of the retina. In the seconds following, this phosphene extends across the whole visual field and alters in structure during further eyeball indentation. It is then seen as irregular large bright spots of light, finely structured moving light grains ('light nebula') and stationary bright stars. Regular geometrical patterns appear only when both eyes are indented simultaneously [1]. When the eyeball deformation is released, part of the retina again lights up for another one or two seconds and curved light lines are seen following the course of the larger retinal vessels (Fig. 1). In the following we will review the history of this phenomenon, which played an important role during the first 2200 years of vision theories and in the development of models to explain normal vision. 2. Pre-Socratic philosophers, Plato and Aristotle Alcmaeon of Croton (6-5th century B. C. ), who was a member of the Pythagoraean sect and one of the founders of Greek medicine, was the first to describe mechanical deformation of the eyeball leading to light sensa tions. According to Aristotle's pupil Theophrast of Eresos, Alcmaeon report ed that 'the eye obviously has fire within,for when the eye is struckfireflashes out' [2, p. 88].
American Bookfinder and Serially American Book Prices Current
Author:
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ISBN:
Category : Books
Languages : en
Pages : 1726
Book Description
Publisher:
ISBN:
Category : Books
Languages : en
Pages : 1726
Book Description
Bowker's Medical Books in Print
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ISBN:
Category : Dentistry
Languages : en
Pages : 860
Book Description
Publisher:
ISBN:
Category : Dentistry
Languages : en
Pages : 860
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CD-ROMs in Print
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Category : CD-ROMs
Languages : en
Pages : 1740
Book Description
Publisher:
ISBN:
Category : CD-ROMs
Languages : en
Pages : 1740
Book Description
The American Encyclopedia and Dictionary of Ophthalmology
Author: Casey Albert Wood
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 732
Book Description
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 732
Book Description
Paperbound Books in Print
Author:
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ISBN:
Category : Bibliography
Languages : en
Pages : 1556
Book Description
Publisher:
ISBN:
Category : Bibliography
Languages : en
Pages : 1556
Book Description
Books in Print Supplement
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Category : American literature
Languages : en
Pages : 1930
Book Description
Publisher:
ISBN:
Category : American literature
Languages : en
Pages : 1930
Book Description
Echo Chamber
Author: Kathleen Hall Jamieson
Publisher: Oxford University Press
ISBN: 0199740860
Category : Political Science
Languages : en
Pages : 319
Book Description
Kathleen Hall Jamieson and Joseph Cappella-two of the nation's foremost experts on politics and media-offers a searching analysis of the conservative media establishment, from talk radio to Fox News to the editorial page of The Wall Street Journal. Echo Chamber is the first serious account of how the conservative media arose, what it consists of, and how it operates. Jamieson and Cappella find that Limbaugh, Fox News, and The Wall Street Journal opinion pages create a self-protective enclave for conservatives, shielding them from other information sources and promoting highly negative views toward conservatism's political opponents. A thoughtful and incisive study, Echo Chamber offers the most authoritative and insightful account of this revolutionary phenomenon and its indelible effect on the American political landscape.
Publisher: Oxford University Press
ISBN: 0199740860
Category : Political Science
Languages : en
Pages : 319
Book Description
Kathleen Hall Jamieson and Joseph Cappella-two of the nation's foremost experts on politics and media-offers a searching analysis of the conservative media establishment, from talk radio to Fox News to the editorial page of The Wall Street Journal. Echo Chamber is the first serious account of how the conservative media arose, what it consists of, and how it operates. Jamieson and Cappella find that Limbaugh, Fox News, and The Wall Street Journal opinion pages create a self-protective enclave for conservatives, shielding them from other information sources and promoting highly negative views toward conservatism's political opponents. A thoughtful and incisive study, Echo Chamber offers the most authoritative and insightful account of this revolutionary phenomenon and its indelible effect on the American political landscape.
Medical Books and Serials in Print, 1979
Author: R. R. Bowker LLC
Publisher: R. R. Bowker
ISBN:
Category : Medical
Languages : en
Pages : 1536
Book Description
Publisher: R. R. Bowker
ISBN:
Category : Medical
Languages : en
Pages : 1536
Book Description