Originally Posted by NintendoManiac64
I just turn the display brightness way down (usually in steps to let my eyes adjust) and use the "white text on black background" high-contrast theme in Windows.
However, this requires a display technology with very good black levels, so most LCDs are out of the question with this method.
I eventually gave in and enabled the auto backlight eco function on my Samsung CCFL LCD. After putting in the acoustic treatments and the dark background to stop light bleed on the AT screen from illuminating the wall, I found that the increased contrast between the LCD and background in the darkened environment demands that the backlight on the LCD comes down some as the room illumination decreases, or I also get headache and eye strain despite using the softer 'movie' mode.
Originally Posted by theycallmeloaf
At most i have tension headaches but no migraines.
I have separate issues that make using smartphones a nightmare, including chronic tension headache, mild farsightedness that seems age-related, and mild astigmatism. If I use the tiny screen for very long, especially in dark environment without some drug store correction for the farsightedness, my vision goes blurry at all viewing distances and the blur persists for several minutes. If I get bright light in my eyes, including unfiltered sunlight, I can develop an instant and incredibly painful headache too.
None of my chronic visual issues require correction except for when reading fine print, or e.g. restaurant menu in dark environment when I lose the 'pinhole camera' advantage of restricted irises, but corrective instrument at the opthalmologist did afford me temporary clarity of sight I never really had even when much younger. I am still debating whether to trade in my drugstore glasses for prescription but given the cost and likelihood my vision will change more as I age and the ability to sort of function without such correction I am sort of just putting it off and being more careful how I manage my screens.
So if you also have tension headache or tension migraine or marginal vision issues, you might be experiencing an 'aura' in the form of visual anomaly that precedes a flare. Do you see bright flashing lights or get blurred vision, or is it all just tension headache?
Either way it sounds like you are just getting old like the rest of us and the tech is causing your marginal vision and/or nervous system to develop issues similar to what we all endure. Try adjusting your screens and if you still cannot tolerate using them go back to the eye doctor and ask for correction on any and all optical issues. There is some possibility too that backlight glare to you is like flyback whine to a teenager, so you might just have to live with the discomfort and/or adapt.
It starts almost immediately when looking at an led display, and if I don't look long goes away shortly after. If I use it for a long time however it can take a long time to go away.
If specific to LED, it might have something to do with the spectrum. Here, check the many ways that LED's are used to generate light of varying colors: https://en.wikipedia.org/wiki/Light-...ng_diode#White
The new Christmas LED lights are much brighter but if you noticed this year, the spectrum looks unnatural and calls attention to itself as sort of 'cold' regardless of color. The older incandescent Christmas lights call attention to themselves immediately for the 'warm' broader spectrum they emit and look more natural for being both less bright and wider band. Maybe your eyes just do not like very narrow spectrum light.
Flicker might also be part of the issue. Combined with narrow spectrum and high intensity it could be just enough to trigger your headache-prone nervous system. Plasma has lower intensity, plus it has very fast (600Hz) 'shutter' frequency. It does not bother my eyes no matter how the settings are adjusted.