JTL Well, I guess you know what I meant, but let me re-formulate.
If the cause were dry eyes, it is hard for me to accept that one laptop gives me huge troubles, whereas I can look at another display without any problem for many hours. In the same room, on the same day, under the same ceiling illumination, same font size.
If the MAIN problem were my eyes, how come from night to morning - in between a software update - I am not able anymore to stare at my phone?
It looks like there are two classes of people suffering from computer vision related strain. One getting some headache and red eyes because of prolonged use, the other being unable to cope with technology, the newer the worse as hpst said. Unfortunately I belong to the latter, and I have not met an eye specialist / optometrist / computer expert who had a clue about what is happening in my eyes/brain / believed what I go thru is not psychological.
Given the "second class" consists only of a ppm of computer users though, I agree that what I wrote above, that the origin of the symptoms is (mostly) in the devices and not in the users' eyes, is incorrect and withdraw :-)
I am too frustrated...