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Blue-blocking Filters and Digital Eyestrain / Tatsiana Palavets in OVS : Optometry & Vision Science, vol. 96, 01 (Janvier 2019)
[article]
in OVS : Optometry & Vision Science > vol. 96, 01 (Janvier 2019)
Titre : Blue-blocking Filters and Digital Eyestrain Type de document : article de périodique Auteurs : Tatsiana Palavets ; Mark Rosenfield Année de publication : 2019 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus HELB]:Optique:filtres optiques
[Thésaurus HELB]:Optique:Lumière bleue / optique
[Thésaurus HELB]:Paramédical:écrans et santé
[Thésaurus HELB]:Paramédical:Tablette numérique
[Thésaurus Mesh]:A:Asthénopie:Asthénopie / thérapie
[Thésaurus Mesh]Collecte de donnéesRésumé : SIGNIFICANCE Many manufacturers are currently marketing blue-blocking (BB) filters, which they claim will reduce the symptoms of digital eyestrain (DES). However, there is limited evidence to support the proposal that DES results from the blue light emitted by these devices.
PURPOSE The visual and ocular symptoms commonly experienced when viewing digital screens are collectively termed DES. The emission spectrum of modern digital displays frequently includes a high percentage of blue light. Being higher in energy, these short wavelengths may contribute to DES. This study examined the effect of a BB filter on symptoms of DES during a sustained near-vision task.
METHODS Twenty-three young, visually normal subjects were required to perform a 30-minute reading task from a tablet computer. The digital screen was overlaid with either a BB or neutral-density (ND) filter producing equal screen luminance. During each session, the accommodative response, pupil diameter, and vertical palpebral aperture dimension were measured at 0, 9, 19, and 29 minutes after the start of the reading task. Immediately following each session, subjects completed a questionnaire to quantify symptoms of DES.
RESULTS The BB filter blocked 99% of the wavelengths between 400 and 500 nm. The mean total symptom scores (±1 SEM) for the BB and ND filter conditions were 42.83 (3.58) and 42.61 (3.17), respectively (P = .62). No significant differences in accommodation or vertical palpebral aperture dimension were observed between the two filter conditions, although the magnitude of the mean accommodative response did increase significantly during the first 9 minutes of the task (P = .02).
CONCLUSIONS A filter that eliminated 99% of the emitted blue light was no more effective at reducing symptoms of DES than an equiluminant ND filter. There is little evidence at this time to support the use of BB filters to minimize near work–induced asthenopia.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Characterizing the Effects of Enchroma Glasses on Color Discrimination / Kevin Bastien in OVS : Optometry & Vision Science, vol. 97, 10 (Octobre 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97, 10 (Octobre 2020)
Titre : Characterizing the Effects of Enchroma Glasses on Color Discrimination Type de document : article de périodique Auteurs : Kevin Bastien ; Dominique Mallet ; Dave Saint-Amour Année de publication : 2020 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus HELB]:Optique:filtres optiques
[Thésaurus HELB]:Paramédical:Daltonisme
[Thésaurus HELB]:Paramédical:Effets indésirables
[Thésaurus Mesh]Lunettes correctrices
[Thésaurus Mesh]Troubles de la vision des couleursRésumé : SIGNIFICANCE: Enchroma glasses were designed to improve color vision among color-blind individuals. The putative aid of such optic filters in alleviating color blindness remains to be demonstrated. Our study shows that the beneficial impacts on color discrimination are quite small in comparison to the undesirable effects. PURPOSE: Congenital color blindness is a common genetic anomaly, and there is still no effective aid for affected people. Enchroma glasses are selective filters designed to enhance color discrimination among red-green colorblind individuals. However, there is a lack of data supporting their efficiency. The present study aimed to characterize the effect of Enchroma filters on color discrimination. METHODS: Colorimetric coordinates of figures from a pseudoisochromatic (American Optical Hardy-Rand-Rittler [AO H-R-R]) test were measured. Nine color-blind and five control adult participants performed the AO H-R-R test and a color-naming task using monochromatic stimuli. All data were collected with and without Enchroma filters. RESULTS: Colorimetric coordinates of AO H-R-R figures were shifted out of their respective pseudoisochromatic line. The AO H-R-R error scores of participants with color blindness were not clearly improved by the filters except for the protanopic subgroup. However, the filters promoted a change in the classification of the defect, specifically by increasing protan errors in deutan participants. In the color-naming task, Enchroma filters impaired perception in all participants, specifically for cyan stimuli. CONCLUSIONS: Enchroma filters may affect the nature of a color vision deficiency without necessarily alleviating its severity. Although the performance of protan participants increased in the pseudoisochromatic task with Enchroma filters, this was the only improvement observed across tasks and subgroups. In summary, this study does not support the efficacy of Enchroma filters in correcting color discrimination in color-blind individuals Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Fact vs. fiction Blue light impact : part 1 of Blue light series / Adam Berger in Global contact, 76 (Mai-aout 2017)
[article]
in Global contact > 76 (Mai-aout 2017) . - p. 20-23
Titre : Fact vs. fiction Blue light impact : part 1 of Blue light series Type de document : article de périodique Auteurs : Adam Berger, Auteur Année de publication : 2017 Article en page(s) : p. 20-23 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]:M:Macula:Macula / traumatismes
[Thésaurus Mesh]Macula
[Thésaurus Mesh]Réduction des dommages
[Thésaurus Mesh]Rythme circadien
[Thésaurus Mesh]Troubles chronobiologiques
[Thésaurus HELB]:Optique:filtres optiques
[Thésaurus HELB]:Optique:Lumière bleue / optiqueMots-clés : Blue light circadian rhythm chronobiology disorders harm reduction Résumé : The impact of Blue light on daily performance, macular cellular damage, and systemic health is becoming universally accepted, both in the scientific literature and in the medical community. As eyecare professionals, we have a great responsibility to help our patients understand how Blue light is affecting their lives and provide them with solutions to minimize that impact. As more lens manufacturers have started to introduce blue-filteringsolutions into their arsenal, many misconceptions have developed around the science of Blue light. This article hopes to dispel some of these myths and provide clarity based on peer-reviewed literature. Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité G Périodique Erasme - périodiques Périodiques Disponible