How does blue light affect sleep?
Wearing blue light glasses improves both the quantity and the quality of sleep. Quality sleep has positive effects on health as well as on work engagement and performance of tasks in the workplace.
Glasses with a blue light filter may improve sleep and increase performance at work, according to a joint study by researchers at Indiana University and University of Washington. The study was published in the English-language journal “Journal of Applied Psychology”.
People are often exposed to blue light
Many technologies in use today, such as computer screens, smartphones and tablets, emit blue light, which can disrupt sleep. In recent years, the use of these devices at work has also increased significantly.
Blue light and the circadian rhythm?
The benefits of blue light glasses (glasses that filter blue light) for people who spend a lot of time in front of a computer screen have been reported in the past. The new research expands our understanding of the effects on the circadian rhythm, the natural internal process that regulates the sleep-wake cycle and repeats about every 24 hours.
Data from 63 managers and 67 call center employees were analyzed and job performance evaluations were carried out. Participants were randomly selected to test glasses that filter blue light or they were given placebo lenses.
Night owls benefited more from glasses
Wearing blue light glasses creates a form of physiological darkness and thus improves both the quantity and quality of sleep, which has also been linked to better performance at work. In general, the effects of wearing blue light filtering glasses were greater for night owls than for early risers.
While reducing exposure to blue light is beneficial for most people, night owls seem to benefit more as they face larger gaps between their internal clocks and externally controlled work hours, explain the researchers. researchers.
Increased quality of life thanks to blue light filters?
The model used in the new study shows how and when wearing glasses with a blue light filter can help improve quality of life and work performance. Because daily engagement and task performance appear to be linked to underlying biological processes such as the circadian rhythm, which is influenced by blue light, according to the research group.
Blue light glasses are efficient and inexpensive
“This study provides evidence of a very cost-effective way to improve sleep and work outcomes, and the benefits are huge. Personally, I don’t know of any other intervention that would be so effective at such a low cost, ”said study author Professor Cristiano L. Guarana of the Kelley School of Business at Indiana University in A press release.
The researchers add that their analyzes show a general pattern that filtering blue light can have a cumulative effect on key performance variables, at least in the short term. (as)
Special glasses with blue light filters seem to have a positive effect on sleep and performance at work. (Image: georgeoprea9 / Stock.Adobe.com)
Author and source information
This text complies with the requirements of specialized medical literature, medical directives and ongoing studies and has been verified by healthcare professionals.
CL Guarana, CM Barnes, WJ Ong: The Effects of Blue Light Filtration on Sleep and Labor Outcomes., In Journal of Applied Psychology (interviewed October 15, 2020), Journal of Applied Psychology Indiana University: The Research Reveals Blue Light Glasses Improve Sleep and Daily Productivity (Posted October 15, 2020), Indiana University
This article is provided for informational purposes only and should not be used for self-diagnosis or self-treatment. It cannot replace a visit to the doctor.