Evidence map›Paper›PMID 28045969›Full record

ArticlePloS one2017

Blue-Light Filtering Spectacle Lenses: Optical and Clinical Performances.

Tsz Wing Leung, Roger Wing-Hong Li, Chea-Su Kee

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02821403 (Effects of Blue-light Blocking Lens on Visual Functions), which is not on this map. Cited by 43 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed, 1 pooled it
10.2field-weighted citation impact, top 1% 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.

NCT02821403 nacompletednot on this map

Effects of Blue-light Blocking Lens on Visual Functions

TypeinterventionalSponsorThe Hong Kong Polytechnic UniversityRan2014 to 2015Enrolled80ConditionsEffects of Blue-light Blocking Lens on Visual FunctionsArmsclear lens with regular coating, regular coating lens with yellow tint, clear lens with blue-light blocking coating
3 · Its place in the literature

Who cites it

43 citing papers in PubMed, 1 synthesis or guideline pooled it, 152 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Protective effects ofHistology and histopathology · 2026
    Article
  4. Blue-Light Filters in Eye Care: A State-of-the-Art Review.Medical sciences (Basel, Switzerland) · 2026
    Review
  5. Review
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Retinitis Pigmentosa: Current Clinical Management and Emerging Therapies.International journal of molecular sciences · 2023
    Review
  18. Blue Light-Ocular and Systemic Damaging Effects: A Narrative Review.International journal of molecular sciences · 2023
    Review
  19. 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

3 authors at 2 institutions in 2 countries.

Tsz Wing LeungSchool of Optometry, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR.
Roger Wing-Hong LiSchool of Optometry, University of California, Berkeley, California, United States of America.
Chea-Su KeeSchool of Optometry, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR.
Hong Kong Polytechnic University · HKUniversity of California, Berkeley · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposesTo evaluate the optical performance of blue-light filtering spectacle lenses and investigate whether a reduction in blue light transmission affects visual performance and sleep quality.

methodsExperiment 1: The relative changes in phototoxicity, scotopic sensitivity, and melatonin suppression of five blue-light filtering plano spectacle lenses were calculated based on their spectral transmittances measured by a spectrophotometer. Experiment 2: A pseudo-randomized controlled study was conducted to evaluate the clinical performance of two blue-light filtering spectacle lenses (BF: blue-filtering anti-reflection coating; BT: brown-tinted) with a regular clear lens (AR) serving as a control. A total of eighty computer users were recruited from two age cohorts (young adults: 18-30 yrs, middle-aged adults: 40-55 yrs). Contrast sensitivity under standard and glare conditions, and colour discrimination were measured using standard clinical tests. After one month of lens wear, subjective ratings of lens performance were collected by questionnaire.

resultsAll tested blue-light filtering spectacle lenses theoretically reduced the calculated phototoxicity by 10.6% to 23.6%. Although use of the blue-light filters also decreased scotopic sensitivity by 2.4% to 9.6%, and melatonin suppression by 5.8% to 15.0%, over 70% of the participants could not detect these optical changes. Our clinical tests revealed no significant decrease in contrast sensitivity either with (95% confidence intervals [CI]: AR-BT [-0.05, 0.05]; AR-BF [-0.05, 0.06]; BT-BF [-0.06, 0.06]) or without glare (95% CI: AR-BT [-0.01, 0.03]; AR-BF [-0.01, 0.03]; BT-BF [-0.02, 0.02]) and colour discrimination (95% CI: AR-BT [-9.07, 1.02]; AR-BF [-7.06, 4.46]; BT-BF [-3.12, 8.57]).

conclusionBlue-light filtering spectacle lenses can partially filter high-energy short-wavelength light without substantially degrading visual performance and sleep quality. These lenses may serve as a supplementary option for protecting the retina from potential blue-light hazard.

trial registrationClinicalTrials.gov NCT02821403.

Indexed as

EyeglassesLightSleepVisual AcuityAdolescentAdultAge FactorsColorContrast SensitivityFemaleGlareHumansMaleMelatoninMiddle AgedPresbyopiaMelatonin

Identifiers

PMID28045969
PMCPMC5207664
OpenAlexW2567953068

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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.