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Encyclopedia > Descemet's membrane
Descemet's membrane
Vertical section of human cornea from near the margin. (Waldeyer.) Magnified.
1. Epithelium.
2. Anterior elastic lamina.
3. substantia propria.
4. Posterior elastic lamina.
5. Endothelium of the anterior chamber.
a. Oblique fibers in the anterior layer of the substantia propria.
b. Lamellæ the fibers of which are cut across, producing a dotted appearance.
c. Corneal corpuscles appearing fusiform in section.
d. Lamellæ the fibers of which are cut longitudinally.
e. Transition to the sclera, with more distinct fibrillation, and surmounted by a thicker epithelium.
f. Small bloodvessels cut across near the margin of the cornea.
Latin l. limitans posterior corneae
Gray's subject #225 1008
Dorlands/Elsevier l_02/12476281

Descemet's membrane is the basement membrane that lies between the corneal proper substance, also called stroma, and the endothelial layer of the cornea. The endothelial layer is located at the posterior of the cornea. Descemet's membrane, as the basement membrane for the endothelial layer, is the source for the single layer of cuboidal epithelial cells that compose the endothelial layer of the cornea. Image File history File links Gray871. ... Types of epithelium This article discusses the epithelium, an animal anatomical structure. ... The Bowmans membrane (Bowmans layer, anterior limiting lamina, anterior elastic lamina) is a smooth layer in the eye. ... The substantia propria (or stroma of cornea) is fibrous, tough, unyielding, and perfectly transparent. ... The endothelium is the layer of thin, flat cells that lines the interior surface of blood vessels, forming an interface between circulating blood in the lumen and the rest of the vessel wall. ... The anterior chamber if the fluid-filled space inside the eye between the iris and the corneas innermost surface, the endothelium . ... The substantia propria (or stroma of cornea) is fibrous, tough, unyielding, and perfectly transparent. ... The cornea is the curved, transparent layer that covers the front part of the eye and protects its inner structures. ... Fusiform is a spindle-like shape that tapers at both ends. ... Schematic diagram of the human eye. ... Types of epithelium This article discusses the epithelium, an animal anatomical structure. ... The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber, providing most of an eyes optical power [1]. Together with the lens, the cornea refracts light and, as a result, helps the eye to focus. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Elseviers logo Elsevier, the worlds largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. ... ... The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber, providing most of an eyes optical power [1]. Together with the lens, the cornea refracts light and, as a result, helps the eye to focus. ...


It is also known as the Posterior limiting lamina, posterior elastic lamina, lamina elastica posterior, and membrane of Demours. It was named after French physician Jean Descemet (1732-1810}.


See also

  • Kayser-Fleischer ring

Kayser-Fleischer rings are pigmented rings in the peripheral cornea, resulting from copper deposition in Descemets membrane. ...

External links


  Results from FactBites:
 
Netherlands Institute voor Innovative Ocular Surgery - Melles (1305 words)
Fourth, in the event of a micro-perforation, the break in Descemets membrane is self-sealing by the air in the anterior chamber, and the dissection may be continued without loss of the intraocular pressure.
Although Descemets membrane may easily withstand the intraocular pressure in the presence of a Descemetocèle, we found that a large area of exposed, denuded Descemets membrane is fragile, and that a microperforation has a tendency to enlarge by itself due to the elastic properties of Descemets membrane.
If dissection of Descemets membrane is successful, these cases may benefit from the advantages of a lamellar keratoplasty, whereas the procedure is easily converted to a penetrating keratoplasty in the event of perforation.
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