Evidence map›Paper›PMID 31245609›Full record

ArticleBMJ open ophthalmology2019

Protective effects of blue light-blocking shades on phototoxicity in human ocular surface cells.

Yoshimi Niwano, Atsuo Iwasawa, Kazuo Tsubota, Masahiko Ayaki, Kazuno Negishi

Abstract read
In one paragraph

Article in BMJ open ophthalmology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

15 citing papers in PubMed.

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  3. Yonago acta medica · 2024
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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

5 authors.

Yoshimi NiwanoFacultyof Nursing, Shumei University, Yachiyo, Japan.
Atsuo IwasawaDivision of Infection Prevention and Control, Tokyo Healthcare University Postgraduate School, Tokyo, Japan.
Kazuo TsubotaOphthalmology, Keio University School of Medicine, Tokyo, Japan.
Masahiko AyakiOphthalmology, Keio University School of Medicine, Tokyo, Japan.ORCID 0000-0002-9481-0164
Kazuno NegishiOphthalmology, Keio University School of Medicine, Tokyo, Japan.ORCID 0000-0002-2892-9810

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveBlue light hazards for retina and ocular surface have been repeatedly described and many protective methods are introduced for retina; however, no study has been conducted on ocular surface protection. The purpose of this in vitro study was to examine phototoxicity and shade protection after blue light irradiation in primary human cells of corneal surface origin. METHODS AND ANALYSIS: Primary human cells of corneal surface origin were obtained from eye bank eyes. After blue light irradiation (405 nm) of these cells for 3 min, and a further 24 hours' incubation, surviving viable cells were assessed by the methyl thiazolyl tetrazolium assay. Simultaneously, cell viability was determined in wells covered by ultraviolet and blue light shades.

resultsUnder subconfluent conditions, viable cells decreased by around 50% after blue light irradiation, compared with control cells without irradiation. The blue light phototoxicity was not blocked by the control shade, but the ultraviolet-blocking and blue light-blocking shades protected the cells from phototoxicity, producing a 30%-40% reduction (ultraviolet) and 15%-30% reduction (blue light) in viable cells.

conclusionThese results indicate that blue light injures ocular surface cells and the cells are protected from damage by a shade. We recommend blue light protection to maintain ocular health, especially in high-risk populations, such as people with dry eye, contact lens users, the malnourished and the elderly.

Indexed as

conjunctivacorneaocular surface

Identifiers

PMID31245609
PMCPMC6557184

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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.