Protective effect of blue-light shield eyewear for adults against light pollution from self-luminous devices used at night

Masahiko Ayaki, Atsuhiko Hattori, Yusuke Maruyama, Masaki Nakano, Michitaka Yoshimura, Momoko Kitazawa, Kazuno Negishi, Kazuo Tsubota

Research output: Contribution to journalArticle

28 Citations (Scopus)


We investigated sleep quality and melatonin in 12 adults who wore blue-light shield or control eyewear 2 hours before sleep while using a self-luminous portable device, and assessed visual quality for the two eyewear types. Overnight melatonin secretion was significantly higher after using the blue-light shield (P <0.05) than with the control eyewear. Sleep efficacy and sleep latency were significantly superior for wearers of the blue-light shield (P <0.05 for both), and this group reported greater sleepiness during portable device use compared to those using the control eyewear. Participants rated the blue-light shield as providing acceptable visual quality.

Original languageEnglish
Pages (from-to)134-139
Number of pages6
JournalChronobiology International
Issue number1
Publication statusPublished - 2016 Jan 2



  • Blue-light
  • eye fatigue
  • eyewear
  • light pollution
  • melatonin
  • retinal ganglion cells
  • sleep

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

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