Hyaloid artery

Artery: Hyaloid artery
Schematic diagram of the human eye en.svg
The hyaloid artery is located on the gray band near the center of the image.
Latin arteria hyaloidea
Source central retinal artery   

The hyaloid artery is a branch of the ophthalmic artery, which is itself a branch of the internal carotid artery. It is contained within the optic stalk of the eye and extends from the optic disc through the vitreous humor to the lens. Usually fully regressed before birth, its purpose is to supply nutrients to the developing lens in the growing fetus.

During the tenth week of development in humans (time varies depending on species), the lens grows independent of a blood supply and the hyaloid artery usually regresses. Its proximal portion remains as the central artery of the retina. Regression of the hyaloid artery leaves a clear central zone through the vitreous humor, called the hyaloid canal or Cloquet's canal. Cloquet's canal is named after the French physician Jules Germain Cloquet (1790–1883) who first described it.

Occasionally the artery may not fully regress, resulting in the condition persistent hyaloid artery. More commonly, small remnants of the artery may remain. Free remnants can sometimes be seen as "floaters". An anterior remnant of the hyaloid artery can be seen in some people as Mittendorf's dot, a small pinpoint-like scar on the posterior surface of the lens.[1] A posterior remnant may be seen where the artery left the optic disc, and is known as Bergmeister's papilla.

See also

Notes

  1. ^ Lee Ann Remington, Clinical Anatomy of the Visual System, 2005 p. 124

External links



Wikimedia Foundation. 2010.

Look at other dictionaries:

  • hyaloid artery — a fetal artery lying in the hyaloid canal of the eye and supplying the lens. * * * arteria hyaloidea …   Medical dictionary

  • hyaloid artery — a fetal artery lying in the hyaloid canal of the eye and supplying the lens …   The new mediacal dictionary

  • Артерия Стекловидного Тела Глаза (Hyaloid Artery) — артерия плода, проходящая в стекловидном канале глаза и снабжающая кровью его хрусталик. Источник: Медицинский словарь …   Медицинские термины

  • Artery — A vessel that carries blood that is high in oxygen content away from the heart to the farthest reaches of the body. Since blood in arteries is usually full of oxygen, the hemoglobin in the red blood cells is oxygenated. The resultant form of… …   Medical dictionary

  • АРТЕРИЯ СТЕКЛОВИДНОГО ТЕЛА ГЛАЗА — (hyaloid artery) артерия плода, проходящая в стекловидном канале глаза и снабжающая кровью его хрусталик …   Толковый словарь по медицине

  • canal — A duct or channel; a tubular structure. SEE ALSO: c., duct. SYN: canalis [TA]. [L. canalis] abdominal c. SYN: inguinal c.. accessory c. a channel leading from the root …   Medical dictionary

  • Bergmeister's papilla — Bergmeister’s papilla arises from the centre of the optic disc, consists of a small tuft of fibrous tissue and represents a remnant of the hyaloid artery. The hyaloid artery provides nutrition to the lens during development in the foetus, and… …   Wikipedia

  • Lens (anatomy) — Crystalline lens (anatomy) Light from a single point of a distant object and light from a single point of a near object being brought to a focus by changing the curvature of the lens …   Wikipedia

  • Floater — For other uses, see Floater (disambiguation). Floater Classification and external resources Simulated image of floaters against a blue sky ICD 10 H …   Wikipedia

  • Vitreous — A clear, jelly like substance that fills the middle of the eye. Also called the vitreous humor, humor in medicine referring to a fluid (or semifluid) substance. * * * 1. Glassy; resembling glass. 2. SYN: v. body. [L. vitreus, glassy, fr. vitrum,… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.