Download PDF, EPUB, MOBI Prevalent Diseases of the Eye
Download PDF, EPUB, MOBI Prevalent Diseases of the Eye
Prevalent Diseases of the Eye.cSamuel Theobald
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Author: Samuel Theobald
Page Count: 162 pages
Published Date: 20 May 2012
Publisher: Rarebooksclub.com
Publication Country: United States
Language: English
ISBN: 9781236318619
Download Link: Prevalent Diseases of the Eye
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...that the crystalline lens was the "seat of vision," and, as they knew that sight could be restored by the removal of a cataract, they were, perforce, driven to the conclusion that the opacity which they displaced from behind the pupil was not the lens, but an opaque substance which, cataract-like, had poured down over its anterior surface. Hence the Greek term hypochyma and the Latin term, first used in medieval times, cataracta. Astonishing as it appears to us in the light of modern methods of research, this view was generally accepted up to the beginning of the eighteenth century, when Brisseau, a French surgeon, dissected the cataractous eye of a cadaver upon which he had previously performed the operation of depression, and discovered that the opacity which he had displaced from behind the pupil was, indeed, the crystalline lens. His discovery, which, of course, involved the abandonment of the view that the lens was essential to sight, was laid before the French Academy, but did not receive its endorsement until after three years of persistent opposition. Cataract, though encountered most frequently in old age, occurs at all periods of life; indeed, as is well known, it is at times of congenital origin. Of the several classifications of cataract the one of greatest practical utility is that which is based upon the time of life at which the cataract develops, those which form after middle life being denominated senile or hard, and those which occur earlier than this juvenile or soft, cataracts, the hardness or softness of the cataract being dependent upon the presence or absence of a firm nucleus, the formation of which has already been described. Cataracts are also classified as general cataracts, those in which the opacity, sooner or later, i...
Read online Prevalent Diseases of the Eye Buy Prevalent Diseases of the Eye Download and read Prevalent Diseases of the Eye for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook Prevalent Diseases of the Eye
Prevalent Diseases of the Eye.cSamuel Theobald
Author: Samuel Theobald
Page Count: 162 pages
Published Date: 20 May 2012
Publisher: Rarebooksclub.com
Publication Country: United States
Language: English
ISBN: 9781236318619
Download Link: Prevalent Diseases of the Eye
---------------------------------------------------------------
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...that the crystalline lens was the "seat of vision," and, as they knew that sight could be restored by the removal of a cataract, they were, perforce, driven to the conclusion that the opacity which they displaced from behind the pupil was not the lens, but an opaque substance which, cataract-like, had poured down over its anterior surface. Hence the Greek term hypochyma and the Latin term, first used in medieval times, cataracta. Astonishing as it appears to us in the light of modern methods of research, this view was generally accepted up to the beginning of the eighteenth century, when Brisseau, a French surgeon, dissected the cataractous eye of a cadaver upon which he had previously performed the operation of depression, and discovered that the opacity which he had displaced from behind the pupil was, indeed, the crystalline lens. His discovery, which, of course, involved the abandonment of the view that the lens was essential to sight, was laid before the French Academy, but did not receive its endorsement until after three years of persistent opposition. Cataract, though encountered most frequently in old age, occurs at all periods of life; indeed, as is well known, it is at times of congenital origin. Of the several classifications of cataract the one of greatest practical utility is that which is based upon the time of life at which the cataract develops, those which form after middle life being denominated senile or hard, and those which occur earlier than this juvenile or soft, cataracts, the hardness or softness of the cataract being dependent upon the presence or absence of a firm nucleus, the formation of which has already been described. Cataracts are also classified as general cataracts, those in which the opacity, sooner or later, i...
Read online Prevalent Diseases of the Eye Buy Prevalent Diseases of the Eye Download and read Prevalent Diseases of the Eye for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook Prevalent Diseases of the Eye