What Are Blue Light Glasses?

Young woman with blue light blocking glasses yellow lenses working with laptop on white sofa

Digital devices—which means anything with a screen, ranging from your phone, tablet, laptop, or even a desktop computer—have become a way of life. Spending multiple hours on digital devices fatigues the eyes, causing “computer vision syndrome,” which leads to blurry vision, difficulty focusing, dry eyes, sore eyes, and headaches. The blue light that digital devices emit add to this eye fatigue.

Blue light glasses may help. These lenses block or absorb blue light, helping reduce your exposure to blue light waves. Ask your eye doctor which kind of blue light glasses is best for you.

Problems with Blue Light

Excessive exposure to blue light can create problems related to impaired sleep in both children and adults, explains Dr. Kerry Gelb, a New Jersey optometrist and the president of ALLDocs. This is because blue light decreases melatonin production in the brain’s pineal gland. This lack of sleep can then lead to more health issues, “including poor concentration, decreased memory, and elevated blood sugar, just to name a few,” notes Dr. Gelb.

Research also indicates that blue light exposure around the time of an evening meal increases hunger and decreases insulin sensitivity. Dr. Gelb cautions that parents should be extra careful with children and screen time, since screen time has been connected with children’s lower school performance, altered brain structure, and reduced brain function.

More Ideas for How to Prevent Eyestrain

  1. Take frequent breaks from digital device use. Every 20 minutes, stand up and look away for 20 seconds at a distance of 20 feet.
  2. Go outside for exposure to real sunlight.
  3. Cut off screen time two to three hours before bedtime.
  4. Screen filters may help, but don’t rely on them.
  5. If you have a car with a sun roof, drive with it open to let in real light, even opening it a crack helps since light is non-linear.
  6. Get yearly eye exams.
Click to See Our Sources

“Management of digital eye strain” by C. Coles-Brennan et al., Clinical and Experimental Optometery, 1/19

Personal communication: Kerry Gelb, 1/20


Victoria Dolby Toews, MPH

Victoria Dolby Toews, MPH, is an evidence-based, integrative medicine journalist with more than 20 years of research and writing expertise, She received her Master of Public Health from OHSU-PSU School of Public Health.

She is the author or co-author of numerous books, including Life After Baby (2012), The Green Tea Book, 2nd edition (Penguin, 2008). User’s Guide to Healthy Digestion (Basic Health Publications, 2004), The Soy Sensation (McGraw-Hill, 2002), User’s Guide to Glucosamine and Chondroitin (Basic Health Publications, 2002), The Common Cold Cure (Avery, 1999), and The Green Tea Book (Avery, 1998).

Her work was recognized for excellence as a 2001 finalist for the Maggie Awards (Western Publications Association award honoring editorial excellence in magazines west of the Mississippi River).