We all have that one friend who swears by their blue-light blocking glasses. They may claim to sleep better, have reduced migraines, increased attention or feel an overall improvement in wellness. But what does the science say? Do blue light blocking glasses actually work? This article overviews several of many scientific studies delving into the issue. All studies described below are peer-reviewed and include control groups. All were published in 2019.
Improvement of Sleep
In a study published by Scientific Reports researchers studied how blue light specifically affected the sleep of those who work early morning hours. The scientists exposed 18 individuals to three different types of light, at different hours, with and without blue-light blocking glasses. The researchers then assessed alertness, cognition and mood throughout the night. The scientists found that the blue light glasses helped especially in the early morning hours. If an individual struggled sleeping after working on a computer all night, using the glasses significantly improved the ability to fall asleep between the hours of 5 am to 7 am.
Another study in the Netherlands studied the effects of blue-light blocking glasses on 12-17 year old Dutch teenagers who frequently use screens. The study measured the sleep of each individual after
- Normal screen use
- Wearing blue light glasses
- Completely refraining from screen use
And the conclusion of the study? “Blue light blocking glasses as well as refraining from screen use induced an earlier mid-point of sleep compared to habitual screen use. Both interventions restored sleep times of frequent [screen] users to around those of infrequent users.” In other words,
Better Brain Function
A study that took place in Cambridge studied the effect of blue-light blocking glasses on those who struggle with insomnia. After randomly assigning participants to either a placebo or regular blue-light blocking glasses, scientists found that the same individuals achieved significantly better scores on memory and pattern tests.
Scientific evidence not only shows improved brain function for individuals suffering from insomnia, but similar results have been found for adolescents, as illustrated in a similar study.
Increased Overall Health
In another study, researchers tested seven different types of blue-light blocking glasses. While there was a significant difference in how some brands performed over others, blue light blocking glasses “were found to reduce blue light by 6-43%.” Basically, scientists found that blue-light blocking glasses offer significant protection from screens
Finally, in one unique study, scientists extracted eye cells from human eyes. They then exposed some of the eye cells directly to blue light, some eye cells had a UV blocking shade, and some had a blue light blocking shades. The scientists then looked at the human eye cells in a microscope to see how light affected the eye cells. After exposing the cells directly to the light for just three minutes, healthy cells decreased by 50%! But, those with blue-light blocking shades only had a 15% reduction overall. Researchers concluded, “we recommend blue light protection to maintain ocular health, especially in high-risk populations, such as people with dry eye, contact les users, the malnourished and the elderly.”
The scientific evidence overwhelmingly concludes that blue-light blocking glasses improve cognitive function, sleep quality and overall health. Learn more today about the blue light blocking benefits of our patented lens technology.