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SCOTUS skeptical that state abortion bans conflict with federal health care law; Iowa advocates for immigrants push back on Texas-style deportation bill; new hearings, same arguments on both sides for ND pipeline project; clean-air activists to hold "die-in" Friday at LA City Hall.

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"Squad" member Summer Lee wins her primary with a pro-peace platform, Biden signs huge foreign aid bills including support for Ukraine and Israel, and the Arizona House repeals an abortion ban as California moves to welcome Arizona doctors.

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The urban-rural death divide is widening for working-age Americans, many home internet connections established for rural students during COVID have been broken, and a new federal rule aims to put the "public" back in public lands.

Tips for Tennesseans to Avoid Eyestrain, Vision Problems

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Friday, February 10, 2023   

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

Staying connected may be important, but health experts -- including in Tennessee -- say prolonged exposure poses health risks to be aware of.

Sunlight may be the major source, but digital screens also emit blue light.

Christine Shieh, cornea specialist and assistant professor at the Vanderbilt Eye Institute, said electronic blue-light exposure can affect a person's circadian rhythms and sleep-wake cycles.

"Most scientists and ophthalmologists would say that there is some interesting literature that blue-light exposure from our electronic devices can make it harder for us to go to sleep at night," Shieh explained. "There's a general body of consensus -- including, you know, from various professional organizations -- that limiting electronic use before bedtime will help people go to sleep."

She added other vision problems from staring at screens are not necessarily due to blue light. Eyestrain known as "computer vision syndrome" can be complex. To avoid it, experts recommend what's known as the "20-20-20 rule": Look at something at least 20 feet away for 20 seconds, every 20 minutes.

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

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

Edmonds suggested annual eye exams to help keep eyes healthy throughout your life and identify the sources of eyestrain. He added certain diseases such as glaucoma can ultimately damage a person's sight, and by the time it is diagnosed, it might be too late to avoid vision loss.

Disclosure: United Healthcare 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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