Cited by 15Sleep and Work-Related FatigueCircadian rhythm and melatoninSleep and related disorders

The effects of screen light filtering software on cognitive performance and sleep among night workers

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Kazemi, Reza, Alighanbari, Negar, Zamanian, Zahra·2019·Health Promotion Perspectives

Abstract

Background: Pervious studies have reported impaired performance, sleepiness and sleep deprivation among night workers. The purpose of this study was to investigate the effect of color Screen Light Filtering software on cognitive performance, alertness and sleep quality among night shift operators of a medical emergency operations center. Methods: This field trial interventional study was carried out among 30 nightshift operators of Shiraz emergency control center. The baseline assessments were carried out under the existing computer screen light conditions in the week preceding the installation of f.lux software. The same measurements were repeated again 4 weeks after installing the software. The cognitive performance of the participants was measured using continuous performance test (CPT) and n-back, while their sleep quality was assessed through Pietersburg Sleep Quality Index (PSQI). Further, to assess their subjective and objective alertness, Stanford sleepiness index and go/no go test were used, respectively. Results: The results of this study showed that Screen Light Filtering software significantly increased subjective (P < 0.001) and objective alertness (P < 0.05). Additionally, the performance of the working memory (P = 0.008) and sleep quality (P = 0.008) improved significantly after the intervention. Conclusion: The results revealed that using Screen Light Filtering software is an effective and low-cost method to improve sleep quality and cognitive performance since it filters the short wavelength part of the spectrum and helps body adaptation.

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  1. [23]Mohammadi M Mazloumi A Nasl Seraji J Zeraati H Designing questionnaire of assessing mental workload and determine its validity and reliability among ICUs nurses in one of the TUMS’s hospitals Journal of School of Public Health and Institute of Public Health Research 2013 11 2 87 96 [Persian].
  2. [39]Ostrin LA Abbott KS Queener HM Attenuation of short wavelengths alters sleep and the ipRGC pupil response Ophthalmic Physiol Opt 2017 37 4 440 50 10.1111/opo.12385 28656675 PMC7229994 · DOI · Paper page

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Authors
Kazemi, R., Alighanbari, N., & Zamanian, Z.
Affiliations
Shiraz University of Medical Sciences (IR)
Corresponding author
Kazemi, Reza
Venue
Health Promotion Perspectives
Published
2019-08-06
Volume
9
Issue
3
Pages
233-240
ISSN
2228-6497 (ISSN-L)
OpenAlex
W2969164673
Cited by
15
References
39
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 2 · 2022: 3 · 2021: 4 · 2020: 1 · 2019: 1
FWCI
2.65
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Health Promotion Perspectives (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Shiraz University of Medical Sciences
  • Shiraz University
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
night shift workers, cognitive performance, sleep quality, alertness, sleep deprivation, blue light exposure, working memory

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