When I look at PWM/flicker (at low frequencies), including old CRT monitors and TVs and some room lighting:
- After just a few seconds, it feels like the muscles around my eyes tense up (not visible)
- This feeling can stay for hours even if I stop the exposure soon
- Visible muscle twitching of eye lids and sometimes cheeks after prolonged exposure
- When I wake up the next morning, my eyes are very red and feel dry for some minutes, and sometimes there's a morning headache
When I look at the still unexplained stuff some software does (Windows 10 post build 1511, Firefox Quantum, "bad" Android ROMs):
- After just a few minutes, my left eye starts to hurt first
- When I look in the mirror, that eye is very red in the area between pupil and nose
- When I continue to use the problematic software or operating system, both eyes start to feel like they're burning
- This can make me feel quite sick and exhausted until the next day
When I look at average, supposedly flicker-free monitors/displays:
- Eyes start to burn after either some minutes or some hours (depending on the device)
- I feel the need to turn the brightness down again and again until it's zero
- Headaches might kick in after some hours
- Again burning, dry eyes at the morning
When I look at flickering monitors:
So the weird feeling around my eyes is my PWM detector and my hurting left eye is my "something's wrong with the software" detector.
Not sure about blue light. It might be the reason I need to turn the brightness way down.
Eye doctors didn't find anything wrong and neurologists don't have explanations nor solutions so far.