Evidence map›Paper›PMID 19856011›Full record

ReviewDer Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft2009

[Meibomian glands. Part II: physiology, characteristics, distribution and function of meibomian oil].

E Knop, N Knop, F Schirra

Abstract readReview
PubMed Publisher
In one paragraph

Review in Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
3.6field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 37 citations in OpenAlex.

  1. Article
  2. Deficiency in Acyl-CoA:Wax Alcohol Acyltransferase 2 causes evaporative dry eye disease by abolishing biosynthesis of wax esters.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2020
    Article
  3. Review
  4. Lipid Saturation and the Rheology of Human Tear Lipids.International journal of molecular sciences · 2019
    Article
  5. Article
  6. TearCareClinical ophthalmology (Auckland, N.Z.) · 2019
    Article
  7. Article
  8. A novel system, TearCareClinical ophthalmology (Auckland, N.Z.) · 2018
    Article
  9. Article
  10. Article
  11. Sebum/Meibum Surface Film Interactions and Phase Transitional Differences.Investigative ophthalmology & visual science · 2016
    Article
  12. Article
  13. Article
  14. [Testosterone reduces the expression of keratinization-promoting genes in murine Meibomian glands].Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft · 2013
    Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Changes in gene expression in human meibomian gland dysfunction.Investigative ophthalmology & visual science · 2011
    Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 3 institutions in 1 country.

E KnopForschungslabor der Augenklinik, Campus Virchow Klinikum, Charite - Universitätsmedizin Berlin, Ziegelstr. 5-9, 10117 Berlin. erich.knop@charite.de
N Knop
F Schirra
Charité - Universitätsmedizin Berlin · DEMedizinische Hochschule Hannover · DEUniversitätsklinikum des Saarlandes · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The oily secretion (meibum) of the Meibomian glands forms the superficial layer of the pre-ocular tear film and reduces evaporation of the aqueous phase. Meibum is a complex mixture of various lipids and minor protein components as well as other components of the secretory meibocytes, which form a clear liquid at body temperature. The exact composition and functions of meibum are still partly unknown, in particular the interaction of the water insoluble non-polar lipids with the polar, partly water soluble, lipids and potentially with proteins, which altogether interact to maintain the connection with the underlying aqueous tear phase. Meibum is transported within the gland by the force of secretory pressure from continuous secretion and by muscular action of the orbicularis muscle and Riolans muscles during blinking. After delivery of meibum onto the posterior lid margin the oil moves from the posterior lid margin reservoir onto the tear meniscus and is pulled as a thin layer onto the pre-ocular tear film every time the lid opens. During lid closure it is compressed and a small part is continuously renewed. Meibum also has a barrier function against the spillage of tears over the inner border of the lid and against the entry of skin lipids (sebum) from the free lid margin.

Indexed as

Lipid MetabolismModels, BiologicalHumansLipidsMeibomian GlandsTearsTissue DistributionLipids

Identifiers

PMID19856011
OpenAlexW1486466890

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.