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Blue-Light Exposure May Affect Your Eyes, Sleep and Health

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Thursday, February 9, 2023   

The increased use of digital devices, computers, television and tablets exposes us to more blue light each day.

Eye professionals are concerned the constant use of digital devices could eventually result in long-term health problems.

Dr. Scott Edmonds, chief eye care officer for UnitedHealthcare Vision, said it is important to know the warning signs if you are looking at your screens and digital devices too long.

"People that work on the screens all the time will report that their eyes feel scratchy or burning; they often notice that the print goes in and out of focus; their eyes may tear, they get red and irritated," Edmonds outlined. "People can get headaches, brain fog, and those are kind of the things that mean you've really been on that screen too long."

Edmonds suggested annual eye exams can help keep your eyes healthy throughout your life and identify the source of eye strain. He added certain diseases such as glaucoma can ultimately damage your sight, and by the time it is diagnosed, it can be a loss which cannot be recovered.

Dr. Donald Morris, an ophthalmologist in Pittsburgh, said blue light is important in our waking cycle, to wake us up and decrease melatonin production. But he added it also affects your ability to prepare for sleep.

"So we know that it messes with what's called our circadian rhythms, and our circadian rhythms are what essentially create our sleeping and waking cycle," Morris explained. "And again, because blue light can affect melatonin production, it can decrease it. When we're looking at it in the evening, it can make it harder for us to go to sleep."

Morris pointed out some people experience digital eye strain when they spend too much time looking at computer screens. He noted their eyes get tired, they burn, and things get blurry. It gets harder for them to concentrate, and the surface of the eye tends to dry. He said the American Academy of Ophthalmology recommends taking breaks from looking at a screen.

"The ways to help with digital eyestrain are something called the 20-20-20 rule," Morris emphasized. "When you're on the computer for long periods of time, after about 20 minutes, take a break, and look at an object 20 feet away for 20 seconds."

Morris added it is important to be cautious of exposure to high-energy light such as ultraviolet light from the sun, which increases the risks of eye diseases, including cataracts, cancers or growths around the eyes, and likely macular degeneration. He recommended wearing ultraviolet protection in glasses and sunglasses.

Disclosure: UnitedHealthcare contributes to our fund for reporting on Health Issues. If you would like to help support news in the public interest, click here.


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