skip to main content
skip to newscasts

Thursday, April 25, 2024

Public News Service Logo
facebook instagram linkedin reddit youtube twitter
view newscast page
play newscast audioPlay

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.

view newscast page
play newscast audioPlay

"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.

view newscast page
play newscast audioPlay

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.

Blue Light From Screens Could Impact Sleep

play audio
Play

Friday, February 17, 2023   

With the rise in digital device use, more people are expressing concern about exposure to blue light.

While blue light is around us daily as part of sunlight, artificial sources of blue light from device screens are often adding hours of exposure after dusk. Experts recommend heavy users take periodic breaks from device screens by using the 20-20-20 rule, which is a 20-second break, every 20 minutes to look at something 20 feet away.

Dr. Bryce St. Clair, instructor in the Department of Ophthalmology at Johns Hopkins University, said the concern over blue light is exaggerated, but it can affect sleep in some people.

"Blue light, we know will signal your brain to stay more stimulated," St. Clair pointed out. "Some people will say when they are on a phone or on a laptop before bed, that they stay awake longer than usual. And we know there's evidence to suggest that it affects circadian rhythms mildly."

He added people who experience difficulty falling asleep should use the blue light blocker or night mode on their devices.

Some people experience symptoms of eye strain with long periods of screen time. St. Clair explained with device use there is some evidence of reduced blinking.

"There's anecdotal evidence to suggest that if you are somehow involved with blue light devices, that you blink less often than those who don't use blue light devices," St. Clair noted.

He used the example of a physical book, emphasizing readers will blink significantly more often compared to those reading on a device, which may cause irritation for people who already have dry eyes.

St. Clair stressed ultraviolet radiation from the sun is a primary concern. He advised the single best thing you can do for your eyes is to wear sunglasses outdoors.

"Why are sunglasses fantastic? One, anytime you're squinting because it's too bright outside. That is your eye's way of telling you that's too much light. Number two, it prevents UV radiation and UV damage to the lens of your eye which can cause cataracts, to the retina which can cause macular degeneration," St. Clair outlined.

He also stated sunglasses help protect the eyelids against skin cancer. He recommended polarized sunglasses with UVA and UVB protection.


get more stories like this via email
more stories
Rep. Crystal Quade, D-Springfield, the House Democratic floor leader, called Missouri politicians "extremist" on social media after they passed the most restrictive abortion ban in the country and defunded Planned Parenthood. (Fitz/Adobe Stock)

Health and Wellness

play sound

The Missouri Legislature has approved a law to stop its Medicaid program, known as MO HealthNet, from paying Planned Parenthood for medical services …


Environment

play sound

A round of public testimony wrapped up this week as part of renewed efforts by a company seeking permit approval in North Dakota for an underground pi…

Social Issues

play sound

Air travelers could face fewer obstacles in securing a refund if their flight is canceled or changed under new federal rules announced Wednesday…


The Iowa Movement for Migrant Justice calls Senate File 2340 a "ridiculous stunt," passed in an election year "to mobilize voters using fear and anti-immigrant sentiment." (Adobe Stock)

Social Issues

play sound

Advocates for immigrants are pushing back on a bill signed by Iowa Gov. Kim Reynolds in the last few days of the legislative session, modeled on a …

Environment

play sound

An environmental group is suing the U.S. Fish and Wildlife Service to protect the Arkansas mudalia snail under the Endangered Species Act. In …

Currently, more than 2.7 million Californians live within 3,200 feet of an operational oil well. (MSPhotographic/Adobe Stock)

Environment

play sound

Leaders concerned about pollution and climate change are raising awareness about a ballot measure this fall on whether the state should mandate buffer…

play sound

A coalition of climate groups seeking cleaner air at the rail yards and ports of Los Angeles and Long Beach will hold a "die-in" rally tomorrow at Los…

Health and Wellness

play sound

By Marianne Dhenin for Yes! Magazine.Broadcast version by Shanteya Hudson for Georgia News Connection reporting for the YES! Media/Public News …

 

Phone: 303.448.9105 Toll Free: 888.891.9416 Fax: 208.247.1830 Your trusted member- and audience-supported news source since 1996 Copyright © 2021