Blue light emitted from digital devices could contribute to the high prevalence of sleep dysfunction.
In a recent study by the University of Houston College of Optometry, researchers found that blue light emitted from digital devices such as smartphones and tablets could contribute to the high prevalence of sleep dysfunction. Study participants wore short wavelength-blocking glasses three hours before bedtime for two weeks. The results were a 58 percent increase in levels of melatonin (the chemical that helps to regulate the body’s sleeping cycle). This was even higher than increases from over-the-counter melatonin supplements. So if you are struggling to sleep well at night, consider limiting screen time, using screen filters, or wearing glasses to block blue light at nighttime. “Attenuation of short wavelengths alters sleep and the ipRGC pupil response,” onlinelibrary.wiley.com, June 27, 2017.