2nd pic from duckduckgo
Posted on 09/14/2020 3:57:40 PM PDT by Pining_4_TX
There is no published evidence to demonstrate that normal environmental (including electronic) exposure to blue light damages eyesight. However it is acknowledged that eye strain can occur from staring at electronics, which can cause fatigue and headaches. Regular breaks from staring at screens (large or small) is recommended to reduce eye strain.
There is some evidence that blue light from electronics can disrupt circadian rhythms, however, by suppressing the production of melatonin, a hormone that regulates our sleep. This has led electronic manufacturers to offer “night light” settings that reduce the amount of blue light displayed and give your screen’s display a pinkish “warm” tone. In this setting, amber or “blue light” blocking glasses can work like a “night light” setting for our eyes, blocking the blue-light disruption that can be caused by artificial lights or electronic use. But there is no evidence to show that the blue light from electronic devices causes harm. Nor should it, as it’s well below the levels our eyes are exposed to when we’re outside. An analysis published in Nature examined exposure from a number of electronic sources and compared it to international limits. It noted:
Humans have evolved under natural light from the sun. Intentional staring at the sun causes eye injuries, as is reported after solar eclipses.6, 7 However, continuous viewing of the blue sky, certainly in the UK, does not present a risk of eye injuries. Comparing natural exposures with the reasonably foreseeable exposure to optical radiation from lamps, computer screens and mobile devices, such as smartphones shows that the actual spectrally weighted irradiance is lower than the natural exposures.
(Excerpt) Read more at sciencebasedmedicine.org ...
Thanks. I read a lot of books and my new glasses are only for reading. My last pair were bifocals, with reading, and computer sense. With Corneal Dystrophy, my distance vision is fine and I only need sunglasses to drive. Year ‘round.
AMZ has non-prescription glasses with blue-light filters. Tempted.
Time spent on freerepublic doesn’t count as on line time. :)
Blue Blockers do help.
Sounds interesting but I don’t want anything that could flux up my display.
Heh. This is pretty easy to use - it has a slider to adjust the amount of blue that comes through. Also can be set so that it self-adjusts by the time of day.
Unless you’re using an old CRT type monitor from the 90s, it’s pretty hard to break a modern display, if that were an actual concern.
I remember a claim from several years back that CRT displays caused cataracts. I wonder what ever became of that. Science not settled?
2nd pic from duckduckgo
No evidence to support that. There are some studies that show that high exposure to uv light can cause cataracts to form faster, but even in those studies the difference was not that impressive.
Prior eye surgery, diabetes, and use of steroids are much much greater causes of early cataract formation. And everyone gets cataracts if you live long enough.
It became so prevalent that the industry started to clamp down on false specs. At least from their competitors.
The specifications for cinema quality light sources are different than for what most of us can afford, and consumer projectors utilize many settings to bring a warmer, more cinematic viewing experience from a cheap projector.
There are multiple white papers and medical studies that will show whatever you want them to show, to back up a marketing perspective or ad campaign.
But the shorter wavelengths of light, especially wavelengths below 460 angstroms, become purple and then into the ultraviolet. It's these wavelengths that have been demonstrated to cause cellular damage.
Just as infrared wavelengths cause sunburns.
There is a light based stun weapon in the non-lethal arsenal which effectively switches off the optic nerve for not quite half an hour. It relies upon a high energy xenon flash lamp focused through telescopic projector optics to strike a desired target at a considerable distance.
One detail learned about the exposure of the retina and optic nerve to intense blue light is a detrimental effect to the nerve cell’s mitochondria. These structures are the power plant within a cell, which support all processes within the cell in order to sustain life and foster cellular reproduction. These mitochondria can be switched off or destroyed by excess blue light exposure.
And yet I read books on my Kindle Fire in bed and fall to sleep.
Just another way for the Deep State / Deep Healthcare to tell you what to do. What is it with some people that the LONG for someone to tell them what to do on a daily basis? With Flux, it’s worse that that: it controls what you see minute by minute.
Many people do like them, my son-in-law being one of them. He says his eyes feel better when he uses the blue blocking computer glasses. So, who knows? Probably we all need to spend more time outside looking at things far away and less time staring at screens. (Free Grandma advice)
“it controls what you see minute by minute.”
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Yeah, like the horizontal hold or contrast adjustment on a TV! Pure evil, I tell ya!!
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