Transactions of the Ophthalmological Society of the United Kingdom Volume 24

Transactions of the Ophthalmological Society of the United Kingdom Volume 24

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...eccentric, narrowing of the lumen (Fig. 46). The endothelial cells are well preserved, and do not show the vacuolation sometimes found where they are proliferated. There is usually a fairly definite and more flattened layer towards the lumen, which generally contains blood. (2) A thickening of the connective and muscular tissues of the wall in the form of concentric layers of tissue, with rather scanty oval and elongated nuclei between them. In some instances this thickening is very great, so as almost, or, in the case of some of the smaller vessels, quite, to obliterate the lumen. In these latter cases the tissue has a more homogeneous, less definitely laminated aspect, and the nuclei are scantier. It is to be regarded as a "hyaline" change, a term convenient for descriptive purposes to indicate a change of the chemical nature of which we are ignorant. The degeneration is not an amyloid one, for it fails to take on the stains for amyloid substance. Of these changes it may be said that the former affect chiefly the veins and the latter chiefly the arteries, but various combinations of the two are to be found in vessels of both kinds, while some of the vessels appear quite normal. Many of the veins are highly engorged. Following the veins backwards, we find them but little altered in their course down the side of the cup. Just at the anterior part of the lamina cribrosa a normal single central vein is formed, which lies in loose connective tissue and which shows no thickening of its walls or proliferation of its endothelium. A little farther back, however, the lumen is invaded by two trabecules of connective tissue which divide it into three loculi, each containing blood and lined with endothelium. The lumen now becomes much...show more

Product details

  • Paperback
  • 189 x 246 x 6mm | 213g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236885570
  • 9781236885579