- Edited
I found this website useful as a starting point to determine if symptoms are from a multitude of factors:
https://www.conradbiologic.com/articles/SubliminalFlickerI.html
A method to determine whether symptoms are due to subliminal flicker, to EMF or to offgassing is as follows. First, with your computer screen on (and set so that it does not go into a dark/sleep mode) sit at your normal working position with a dark towel placed over the face of the screen so that you cannot see any light from it. Be sure not to obstruct any ventilation openings. You could pass the time by reading a book or talking to a friend (but not on the phone because this could introduce another EMF variable). If the towel eliminates the symptoms, then you know that they were due to subliminal flicker. If it does not, the next step would be to either wear a good activated carbon mask, or to exhaust from the room all offgassing vapors that could possibly be coming off the monitor. If that does not cure the problem, the culprit is most likely a sensitivity to EMF from the monitor, computer, and/or keyboard and mouse. To determine the worst source of EMF, the next step could be to remain sitting at your workstation with the computer on (and not in sleep mode) but with the monitor off. Next, with the computer and monitor on, sit in the same position but with the keyboard and mouse pushed away from you, etc. Be sure to change only one variable for each experiment.
New equipment (laptops, monitors) off gassing is something worth taking into account.
Stuff people here already know but worth mentioning again:
(the periphery of the retina is more sensitive to flicker than the center of the retina), this means that the larger the screen and/or the closer you are to it, the worse the effect of the flicker;
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You may do better with a CRT monitor running at a very high refresh rate, provided that you can tolerate or adequately shield its EMF and radio frequency (RF) emissions. (Although LCDs usually have less low frequency EMF than CRTs, they can have as much or more RF emissions.)