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The presidential race is a toss-up according to new polling; prominent church leaders work to ignite Black voter power; and a look at how cows can help curb methane emissions.

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Republicans defend their candidate from allegations of fascism, Trump says he'll fire special prosecutor Jack Smith if reelected, and California voters are poised to increase penalties for petty crime.

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Down-ballot races get short shrift in funding from political parties, Minnesota nice means helping high school kids get a head start on future careers, and Oklahoma tribes reverse effects of historic ag consolidation.

Health Experts Amplify Warnings about Blue Light Exposure

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Wednesday, February 8, 2023   

With increased use of digital devices and computers in daily life, people are exposed to more and more blue light.

Health experts, including a Wisconsin doctor, say staying connected is one thing, but prolonged exposure poses health risks. In addition to the sun, digital screens are a source of blue light.

Dr. Bryce Christopherson, a Wisconsin board licensed optometrist, said one risk from overexposure is interfering with the body's circadian rhythm, the "internal clock" which regulates a person's sleep cycle.

"If you're working on a tablet, your computer, or smartphone or whatever before you go to sleep, that can make it harder to fall asleep," Christopherson pointed out.

A lack of sleep can produce problems, such as lower productivity and headaches. He suggested wearing blue-light-blocking glasses when looking at a screen for long periods.

Other tips include taking breaks around every 20 minutes from digital screens, by looking at something else at least 20 feet away for 20 seconds. And of course, limit screen time before bed.

Dr. Scott Edmonds, chief eye care officer for UnitedHealthcare Vision, said specialists became concerned during the pandemic about blue-light exposure as more people were relying heavily on digital screens at home. He worries soon, some of the same concerns will surface about blue light that happened with ultraviolet light.

"The photo receptors can certainly process blue light, but it puts a lot of strain on them," Edmonds explained. "And we're concerned that over time, the retina will become damaged, and we'll start to see age-related macular degeneration from this, like we did with UV light."

In addition to taking screen breaks, eye-care professionals recommend making sure your computer screens are clear and clean, as researchers continue to study potential dangers.

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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