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Morphometric assessment of the central retinal artery and vein in the optic nerve head.

Publication ,  Journal Article
Taylor, AW; Sehu, W; Williamson, TH; Lee, WR
Published in: Can J Ophthalmol
December 1993

The exact anatomy of the central retinal vein as it exits the eye is unknown. In this study serial sections of the central retinal vein and artery in the anterior optic nerve from six globes (five from cornea donors and one exenteration specimen) were examined by image analysis and three-dimensional reconstruction to determine their luminal characteristics. The retinal artery was found to have a uniform perimetric length and cross-sectional area. The vein, however, had a reduction in these measurements at the level of the lamina cribrosa, signifying a constriction of the vessel at this site. In addition, the cross section of the vein usually formed a "D" or crescentic shape adjacent to the circular artery. We propose that the constriction of the vein acts as a "throttle" mechanism on venous blood flow. Thus, a relatively high venous blood pressure is maintained within the high-pressure intraocular environment, thereby maintaining the patency of the retinal venules and capillaries.

Duke Scholars

Published In

Can J Ophthalmol

ISSN

0008-4182

Publication Date

December 1993

Volume

28

Issue

7

Start / End Page

320 / 324

Location

England

Related Subject Headings

  • Retinal Vein
  • Retinal Artery
  • Optic Nerve
  • Optic Disk
  • Ophthalmology & Optometry
  • Image Processing, Computer-Assisted
  • Humans
  • Blood Pressure
  • Blood Flow Velocity
  • Anthropometry
 

Citation

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MLA
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Taylor, A. W., Sehu, W., Williamson, T. H., & Lee, W. R. (1993). Morphometric assessment of the central retinal artery and vein in the optic nerve head. Can J Ophthalmol, 28(7), 320–324.
Taylor, A. W., W. Sehu, T. H. Williamson, and W. R. Lee. “Morphometric assessment of the central retinal artery and vein in the optic nerve head.Can J Ophthalmol 28, no. 7 (December 1993): 320–24.
Taylor AW, Sehu W, Williamson TH, Lee WR. Morphometric assessment of the central retinal artery and vein in the optic nerve head. Can J Ophthalmol. 1993 Dec;28(7):320–4.
Taylor, A. W., et al. “Morphometric assessment of the central retinal artery and vein in the optic nerve head.Can J Ophthalmol, vol. 28, no. 7, Dec. 1993, pp. 320–24.
Taylor AW, Sehu W, Williamson TH, Lee WR. Morphometric assessment of the central retinal artery and vein in the optic nerve head. Can J Ophthalmol. 1993 Dec;28(7):320–324.
Journal cover image

Published In

Can J Ophthalmol

ISSN

0008-4182

Publication Date

December 1993

Volume

28

Issue

7

Start / End Page

320 / 324

Location

England

Related Subject Headings

  • Retinal Vein
  • Retinal Artery
  • Optic Nerve
  • Optic Disk
  • Ophthalmology & Optometry
  • Image Processing, Computer-Assisted
  • Humans
  • Blood Pressure
  • Blood Flow Velocity
  • Anthropometry