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Home > Medicine & Health Science textbooks > Medicine: general issues > Recent Advances in Ophthalmic Science. the Boylston Prize Essay for 1865
Recent Advances in Ophthalmic Science. the Boylston Prize Essay for 1865

Recent Advances in Ophthalmic Science. the Boylston Prize Essay for 1865


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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. 1866 Excerpt: ...spots of atrophy of the choroid often make their appearance near the margin of the crescent or in the vicinity of the macula lutea, and coalesce with the extending staphyloma, giving it an irregular instead of a crescentic form. The disc seems oval instead of round, as the side of the optic nerve next the staphyloma becomes involved in it. As the disease begins to affect the region of the yellow spot, or the optic nerve itself, vision becomes more impaired. With the increased bulging of the sclerotica the danger arises that the retina may not accommodate its surface to that of the outer tunic, and that effusion may be formed between the two structures, giving rise to the condition known as separation of the retina. That such abnormal elongation of the eyeball should be a cause of myopia may be readily seen, --the lengthening of the optic axis giving rise to excess of refraction, so that the focus is formed in front of its normal position. But the affection, itself a cause of myopia, may be yet further increased in consequence of it. Any long-continued convergence of the optic axes, in accommodation for near objects, causes greater external pressure upon the globe from the action of the recti muscles, and at the same time the stooping position of the head assumed in reading and writing favors congestion of the vessels and increases the intra-ocular pressure. Both these influences promote the further yielding of the already weakened tissues, and thus lead to an increase of the staphylomatous bulging. An examination of the fundus oculi with the ophthalmoscope should therefore be made in all cases of short-sightedness, particularly in young subjects; as it is important to detect the existence of staphyloma, if present, that precautions may be taken against its i..


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Product Details
  • ISBN-13: 9781130141665
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 38
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1130141667
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 86 gr


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