Evidence map›Paper›PMID 32165121›Full record

ArticleContact lens & anterior eye : the journal of the British Contact Lens Association2020

Scleral lens wear: Measuring inflammation in the fluid reservoir.

Maria K Walker, Carolina Lema, Rachel Redfern

Abstract read
In one paragraph

Article in Contact lens & anterior eye : the journal of the British Contact Lens Association, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–field-weighted citation impact
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

8 citing papers in PubMed.

  1. Scleral Lens Fenestrations and Fluid Reservoir Debris.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
    Article
  2. Article
  3. Observational
  4. Potential pro-inflammatory impact of scleral lens midday fogging on human corneal epithelial cells: An in vitro study.Contact lens & anterior eye : the journal of the British Contact Lens Association · 2024
    Article
  5. Review
  6. Nonpolar Lipids Contribute to Midday Fogging During Scleral Lens Wear.Investigative ophthalmology & visual science · 2023
    Article
  7. Article
  8. 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.

Maria K WalkerUniversity of Houston College of Optometry, The Ocular Surface Institute, 4901 Calhoun Road, Houston, TX 77006, United States. Electronic address: mkwalker@Central.UH.EDU.
Carolina LemaUniversity of Houston College of Optometry, The Ocular Surface Institute, 4901 Calhoun Road, Houston, TX 77006, United States. Electronic address: fclemahe@Central.UH.EDU.
Rachel RedfernUniversity of Houston College of Optometry, The Ocular Surface Institute, 4901 Calhoun Road, Houston, TX 77006, United States. Electronic address: rredfer2@Central.UH.EDU.

Funding

Research Programming ModuleP30EY007551 · NEI · UNIVERSITY OF HOUSTON · PI VALLABH E DAS · 1988 to 2026
$16.4M
Toll-Like Receptor and Dry Eye Inflammation and InfectionR01EY023628 · NEI · UNIVERSITY OF HOUSTON · PI REDFERN, RACHEL LEIGH · 2013 to 2017
$1.9M
NEI NIH HHS P30 EY007551NEI NIH HHS R01 EY023628
6 · The paper itself

Abstract

purposeTo measure inflammatory mediators in the scleral lens fluid reservoir (FR) in healthy eyes and to compare them to basal tear samples after 8-hs (8h) and 4-days (4d) of scleral lens (SL) wear.

methodsFifteen normal, habitual soft contact lens wearers were fitted with 14.8- or 15.4-mm SLs (Zenlens, Alden Optical, USA). Basal ocular surface tears and FR samples were collected after 8h and 4d of daily SL wear. Levels of interleukin (IL) -4 and -8, matrix metalloproteinase (MMP)-7, -9, and -10, and tissue inhibitor of MMPs (TIMPs) 1-4 were measured in all samples using Luminex assays. Visual acuity, corneal and conjunctival staining, and comfort assessments were completed at the baseline, 8h and 4d time points.

resultsMMP-9 and MMP-10 were greater in FR than basal ocular surface tears. After 8h of SL wear, the median concentration of MMP-9 in the FR and basal tears were 62.7 and 15.2 ng/mL, respectively (p = 0.047). Likewise, MMP-10 was significantly greater in FR compared to basal tears, after 8h (25.8 ng/mL vs 2.8 ng/mL, p < 0.001) and 4d (2.1 ng/mL vs17.2 ng/mL, p = 0.047). IL-4 and IL-8 levels were greater in FR but not significantly at 8h (2.2 vs 3.1 ng/mL; and 0.1 vs 0.4 ng/mL, respectively) or 4d (0.9 vs 3.5 ng/mL; 0.0 vs 0.2 ng/mL). MMP-7 was not affected by SL wear after 8h (46.0 basal vs 54.4 ng/mL FR) or 4d (34.2 vs 87.5 ng/mL). Visual acuity, corneal and conjunctival staining did not change; comfort was reduced in SL compared to soft contact lens wear.

conclusionsThis is the first study to compare the FR with the basal ocular surface tears. MMP-9 and MMP-10 were elevated in the FR after several hours of SL wear, suggesting potential clinical implications of SL wear and deserves further investigation.

Indexed as

Contact Lenses, HydrophilicScleraCorneaHumansInflammationTearsFluid reservoirMMP-10MMP-9Scleral lenses

Identifiers

PMID32165121
PMCPMC11970577

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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.