Hi all, so,
As many on this forum, I have experienced eye strain, but also headaches, pressure in the forehead, some dizziness.
And, also as many people here, my symptoms have appeared the last years but I had no problem before. As many pointed out, there seems that a technology change within screens, in the recent years, must have happened to explain those new symptoms. Now, some people also suffered before but for many others, they had no problems before those new devices came out.
I have done some research and something I found is that the backlight leds have changed since maybe 2016-2017.
Before, wled backlights in monitors were using blue leds with yellow phosphor. But they thought the yellow phosphor was lacking red color. Some years ago, they began using blue leds with red and green phosphors.
Now, one of the main red phosphor used currently, uses (cited in the source i will give a link below) massive amount of HF acid which means hydrofluoric acid, an extremely corrosive substance. I let you google this substance to see its potential hazards and its possible link to the symptoms we experience. So, scientists are aware of that, and that is the reason they are currently searching for alternative red phosphors that dont use harmful substances or in a lesser extent, as you'll be able to read from the study.
The change from yellow phosphor to red phosphor is also the reason why most of the new screens, be it on phones, laptops, or monitors, have a orangish/yellowish/pinkish/redish tint to them. They are warmer. And they have a quite intense red wavelength peak.
Especially for higher gamut monitors, as some low gamut still use the yellow phosphors.
Now, I'm not saying that is the cause of our symptoms or mine. I'm just adding a hypothesis to be discussed. What I like about it is that it is a universal change in backlight technology that has occured some years ago so that it coincidates with some people experiencing symptoms only recently. Also coincidates with many people noticing the more yellowish/pinkish screens nowadays.
Here are the studies :
First study mentions the use of massive amount of hf acid that restricts the further application of this red phosphor. Second study mentions some ways to reduce the higly corrosive hf acid used.
If you don't want to read the whole studies, just type acid within the page to find the mention of HF acid.
Curious to have your opinions on that subject.