Evidence map›Paper›PMID 30562612›Full record

ReviewThe ocular surface2019

Characterization of the thickness of the tear film lipid layer using high resolution microscopy.

Yuqiang Bai, William Ngo, Jason J Nichols

Abstract readReview
In one paragraph

Review in The ocular surface, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
1.1field-weighted citation impact, top 19% 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

17 citing papers in PubMed, 27 citations in OpenAlex.

  1. Article
  2. Imaging Approaches for the Diagnosis of Dry Eye: A Review.Diagnostics (Basel, Switzerland) · 2026
    Review
  3. Article
  4. Observational
  5. Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Effect of Model Tear Film Lipid Layer on Water Evaporation.Investigative ophthalmology & visual science · 2023
    Article
  11. Article
  12. Article
  13. Article
  14. Validation of a new objective method to assess lipid layer thickness without the need of an interferometer.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2022
    Article
  15. Human ocular mucins: The endowed guardians of sight.Advanced drug delivery reviews · 2022
    Review
  16. Article
  17. 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

3 authors at 1 institution in 1 country.

Yuqiang BaiThe University of Alabama at Birmingham, School of Optometry, Department of Optometry & Vision Science, 1716 University Blvd, Birmingham, AL, 35223, USA.
William NgoThe University of Alabama at Birmingham, School of Optometry, Department of Optometry & Vision Science, 1716 University Blvd, Birmingham, AL, 35223, USA.
Jason J NicholsThe University of Alabama at Birmingham, School of Optometry, Department of Optometry & Vision Science, 1716 University Blvd, Birmingham, AL, 35223, USA. Electronic address: jjn@uab.edu.
University of Alabama at Birmingham · US

Funding

The role of (O-acyl)-omega-hydroxy fatty acids in human lipid layer structure and function in health and meibomian gland dysfunction.R01EY026947 · NEI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI NICHOLS, JASON JAY · 2016 to 2020
$1.8M
NEI NIH HHS R01 EY026947
6 · The paper itself

Abstract

Interferometry is an optical technique that have been used to quantify the lipid layer of the precorneal tear film, and to investigate the relationship between lipid layer thickness and tear film evaporation. However, the relationship between lipid layer thickness and the rate of evaporation is far from consistent. One possible reason is the inherent limit of contemporary interferometric systems, which employ objectives with relatively long depth of focus (DOF) (>15 μm or more), which tend to collect excessive extra-planar noise. This limitation may negatively affect the accuracy of the characterization and thickness measurement of the lipid layer. The current system incorporated an objective with limited DOF (∼1.5 μm) into a custom-built optical microscope to image the tear film lipid layer in humans. An algorithm was also developed to process these images. One major outcome of this system is that thick lipid layers exhibit higher variation in thickness values than thin or normal-thickness lipid layers. The variations may reflect the structural differences of the lipid layer, which may offer a novel dimension to explain the missing correlation between lipid layer thickness and evaporation. In summary, the development of the high resolution microscopy system and associated data processing algorithm may provide new insights into the lipid layer structure, topography and their relation to the tear film evaporation rate.

Indexed as

BlinkingDry Eye SyndromesHumansInterferometryLipidsMicroscopyTearsLipidsdry eyeInterferometryLipid layer thicknessTear film

Identifiers

PMID30562612
PMCPMC7039323
OpenAlexW2904427328

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.