https://www.nature.com/articles/s41514-022-00092-z

Blue light is a predominant component of light emitting devices (LEDs), which are increasingly present in our environment. There is already accumulating evidence that blue light exposure causes damage to retinal cells in vitro and in vivo; however, much less is known about potential effects of blue light on non-retinal cells. That blue light may be detrimental at the organismal level independent from retinal effect was recently shown by findings that it reduces lifespan in worms and also in flies with genetically ablated retinas.

Discussion
Understanding the effects of BL on cellular functions is becoming a significant health issue as humans are exposed to more blue-enriched LED illumination for most of the day and even at night due to shift work and light pollution in large cities1. While acute BL is phototoxic to different cells types in vitro16, it is not known whether daily BL exposure across the human lifespan may have long-term effects on cellular functions. Research on model organisms could provide insights into the effects of BL on conserved cellular pathways. Having previously reported that daily exposure to 12 h of BL accelerates aging in adult Drosophila8, we investigated the effects of constant BL on young, middle age, and old flies. We demonstrate that BL affects flies differently across their lifespan with decreased survival and increased brain neurodegeneration observed in old flies after the same length of BL exposure. Furthermore, our data suggest that age-dependent impairments in mitochondrial respiration and energy production contribute to the increased phototoxic effects of BL in older flies.

I hate the Blue Led light from devices and light sources.

https://www.oledworks.com/news/blog/the-hazards-of-blue-light-from-leds/

The Hazards of Blue Light
The French Agency for Food, Environmental and Occupational Health & Safety’s (ANSES) report on the “effects on human health and the environment (fauna and flora) of systems using light-emitting diodes (LEDs)” recommends limiting exposure to blue-rich white light from LED for many reasons.

A bright blue light hurts everyone who can see it, regardless of their proximity to the source. Small point, high intensity, blue-component-rich light, like LEDs, can be reflected from a surfaces (desk or counter top, for example) and reach the eyes. LED lamps are richer in blue content compared to other artificial light sources, and the photobiological risk is even higher when cool-white light is used. Cool-white lights contain particularly high blue content, have high color temperature (i.e. 6000K or higher), and is often used in retail spaces.

 

This guy is proof.


Yes I do know that wasn't caused it.

 

I guess I am in trouble! I prefer blue LED's being it is my favorite color of LED lighting.

 

https://www.cbc.ca/news/canada/british-columbia/headlights-led-driving-safety-night-1.7409099
Headlights seem a lot brighter these days — because they are
Light glare that's dazzling today's drivers can create a dangerous distraction on the road, experts say

"Headlights are getting brighter, smaller and bluer. All three of those things increase a particular kind of glare. It's called discomfort glare," he said.

Experts like Stern say headlight glare is a serious issue across North America as vehicles transition from warmer old-style halogen lights. Newer LED headlights create a more intense, concentrated light that's bluer and can force people to squint in discomfort.

Canada's regulations have been adjusted — but researchers say they have not yet caught up to headlight technology common in other countries.

So night drivers end up blinded — especially if their eyes are older — and looking for their own solutions that can only help so much.

https://www.sciencedirect.com/science/article/abs/pii/S1369847816305897
Creating headlight glare in a driving simulator

 

I will start worrying when the intensity of the blue light I receive from my LED lamp is greater that that I receive from the noontime sun.

 

I have to wonder who participates in these studies.

 

I will start worrying when the intensity of the blue light I receive from my LED lamp is greater that that I receive from the noontime sun.

It's not about blue spectrum intensity in sunlight. It's about how our eyes and visual system reacts to levels of blue light that are out of the ordinary in low light conditions.

 

I have to wonder who participates in these studies.

People, like you and me.

 

My daughter is an optometrist. She can help to answer your questions about blue light.

 

It's not about blue spectrum intensity in sunlight. It's about how our eyes and visual system reacts to levels of blue light that are out of the ordinary in low light conditions.

From the article you posted:

There is already accumulating evidence that blue light exposure causes damage to retinal cells

It is not credible that the blue light from my cell phone is damaging my eyes while the thousand times more intense blue light from the sun does not. This is another nonsense “danger” being promoted by “scientists” with an agenda.

The hypothesis that it messes with the internal clock is more plausible, but recent studies have cast doubt on that as well.

I will continue to not worry.

 

This guy is proof.
View attachment 272801

Yes I do know that wasn't caused it.

Hi,

Is this a joke? Why did they color the guy with an obvious overcoat of blue tint?

 

Hi,

Is this a joke? Why did they color the guy with an obvious overcoat of blue tint?

Not a joke. The guy was Paul Karason and his skin color is a condition known as argyria, which is the result of overindulgence in colloidal silver.

 

Not a joke. The guy was Paul Karason and his skin color is a condition known as argyria, which is the result of overindulgence in colloidal silver.

Oh that's a shame. But it still seems funny that they must have searched for an image of a person with skin colored blue to illustrate the possible dangers of blue light. Blue light didn't cause that, something else did, or the image could even be purposely tinted.

 

A decade ago, blueish headlights were common on vehicles in the UK. These days they're quite rare, thankfully.

 

From the article you posted:

It is not credible that the blue light from my cell phone is damaging my eyes while the thousand times more intense blue light from the sun does not. This is another nonsense “danger” being promoted by “scientists” with an agenda.

The hypothesis that it messes with the internal clock is more plausible, but recent studies have cast doubt on that as well.

I will continue to not worry.

I agree about physical damage to the eye as I don't see how the levels of energy transmitted make that possible. Glare, sleep disturbances and other more subtle effects do have plenty of scientific merit.
https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side

A good point for blue light are those security towers. The bright blue beams from those devices seems to melt the brains of homeless drug addicts, that pain keeps them away.

 

https://sleepreviewmag.com/sleep-he...hat,from screens significantly disrupts sleep.

 

A note to researchers who think smartphones are causing dangerous health issues.

There is a simple sanity check for your idea. If the incidence of the condition has not increased dramatically in the last 20 years, smartphones are not significant cause.

 

https://sleepreviewmag.com/sleep-health/parameters/quality/blue-light-devices-not-sleep-stealer-we-thought/#:~:text=Summary: New research reveals that,from screens significantly disrupts sleep.

Blue Light From Devices May Not Be the Sleep Stealer We Thought
Not definitive or conclusive.
https://www.sciencedirect.com/science/article/pii/S1087079224000376
A bidirectional model of sleep and technology use: A theoretical review of How much, for whom, and which mechanisms

My own option on this subject is that bright blue (or any color) lights on electronics keeps me awake because of light pollution. The black tape solution works to fix that.

 

The black tape solution works to fix that.

Done that! I find blue LEDs incredibly annoying day or night.

 

I've long had the same skepticism of all the "blue light" hysteria. They almost never talk in terms of intensity or cumulative daily exposure. Without that scientific approach it all sounds like junk. A few hours in the sun, which most people agree is healthier than not, exposes a person to far more blue light than whatever they might get indoors.

Personally I think it's either much ado about nothing or possibly, if there really is an effect, about timing and screwing up your internal clock. Can blue light exposure - at low intensity - mess up your clock and give you jet-lag-like symptoms? Maybe.