Evidence map›Paper›PMID 22023815›Full record

ArticleThe ocular surface2011

High resolution microscopy of the lipid layer of the tear film.

P Ewen King-Smith, Jason J Nichols, Richard J Braun, Kelly K Nichols

Abstract read
In one paragraph

Article in The ocular surface, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
7.8field-weighted citation impact, top 3% 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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 60 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. High Resolution Images of Human Meibum Spread on Saline.Investigative ophthalmology & visual science · 2024
    Article
  5. Article
  6. Article
  7. Article
  8. Evidence for Phospholipids on the Surface of Human Tears.Investigative ophthalmology & visual science · 2020
    Article
  9. Ellipsometry of human tears.The ocular surface · 2019
    Article
  10. Review
  11. Mathematical modelling of glob-driven tear film breakup.Mathematical medicine and biology : a journal of the IMA · 2019
    Article
  12. Dynamics of Fluorescent Imaging for Rapid Tear Thinning.Bulletin of mathematical biology · 2019
    Article
  13. On tear film breakup (TBU): dynamics and imaging.Mathematical medicine and biology : a journal of the IMA · 2018
    Article
  14. Review
  15. Article
  16. Computed tear film and osmolarity dynamics on an eye-shaped domain.Mathematical medicine and biology : a journal of the IMA · 2016
    Article
  17. Review
  18. Article
  19. Tear film interferometry and corneal surface roughness.Investigative ophthalmology & visual science · 2014
    Article
  20. Article
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

4 authors at 3 institutions in 1 country.

P Ewen King-SmithCollege of Optometry, Ohio State University, Columbus, Ohio 43210, USA. king.smith.1@osu.edu
Jason J Nichols
Richard J Braun
Kelly K Nichols
University of Houston · USThe Ohio State University · USUniversity of Delaware · US

Funding

Dry Eye in PostmenopauseR01EY015519 · NEI · UNIVERSITY OF HOUSTON · PI NICHOLS, KELLY K · 2007 to 2011
$1.7M
Interferometric Studies of the Fluid Dynamics of the Tear FilmR01EY017951 · NEI · OHIO STATE UNIVERSITY · PI KING-SMITH, PETER E · 2009 to 2012
$1.2M
NEI NIH HHS R01 EY015519NEI NIH HHS R01 EY017951
6 · The paper itself

Abstract

Tear film evaporation is controlled by the lipid layer and is an important factor in dry eye conditions. Because the barrier to evaporation depends on the structure of the lipid layer, a high resolution microscope has been constructed to study the lipid layer in dry and in normal eyes. The microscope incorporates the following features. First, a long working distance microscope objective is used with a high numerical aperture and resolution. Second, because such a high resolution objective has limited depth of focus, 2000 images are recorded with a video camera over a 20-sec period, with the expectation that some images will be in focus. Third, illumination is from a stroboscopic light source having a brief flash duration, to avoid blurring from movement of the lipid layer. Fourth, the image is in focus when the edge of the image is sharp - this feature is used to select images in good focus. Fifth, an aid is included to help align the cornea at normal incidence to the axis of the objective so that the whole lipid image can be in focus. High resolution microscopy has the potential to elucidate several characteristics of the normal and abnormal lipid layer, including different objects and backgrounds, changes in the blink cycle, stability and fluidity, dewetting, gel-like properties and possible relation to lipid domains. It is expected that high resolution microscopy of the lipid layer will provide information about the mechanisms of dry eye disorders. Illustrative results are presented, derived from over 10,000 images from 375 subjects.

Indexed as

AdultAgedAged, 80 and overDry Eye SyndromesEyelid DiseasesFemaleHumansLipid MetabolismLipidsMaleMeibomian GlandsMicroscopyMiddle AgedTearsVideo RecordingVolatilizationLipids

Identifiers

PMID22023815
PMCPMC4313928
OpenAlexW2066259235

What OpenQuestion holds

Textmetadata
LicenceTDM
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.