Schmecker That TUV seems to be the company that was ordered by Intel to test a notebook for measurable differences between driver versions due to eye strain complaints from users. If you look at their test results actually they did see differences, which they couldn't explain, but they didn't bother to check any further. Their verdict: "as the (different flicker) values are so small, the change of the driver do not visibly increase the flicker". They went the easy way by ignoring their own measurements and claiming only "visible flicker" is important. Whatever the arbitrary definition of that is for them. They have done us a disservice, as their verdict made Intel stop the investigation. I would not trust any of TUV's "eye comfort" certificates if they dismiss flicker below an arbitrarily defined and undisclosed threshold.
However, I'm not saying such certificates don't help you. I realize lately more new users join this forum, which is fine. It used to be a place where people meet that have the most severe display and LED eye strain issues. Most regular people can solve their monitor eye strain by simply reducing the brightness and/or applying a blue light filter. So if you're somewhere in between, I can see how a monitor that at least meets some arbitrarily defined flicker requirements may help you. It just makes it more difficult for the rest of us if statements like "PC monitors tend to have flicker-free certification or mention in specs and its easy to find a good one" keep getting posted. It is not that easy for us, and as already stated, even those monitors do flicker.
For example, look at this: https://ledstrain.org/d/793-eizo-flexscan-ev2451
They advertise is as "flicker-free" (https://www.eizo.eu/flexscan/ev2451-bk/), which is a complete joke if you see my measurement results. On that website you can see TUV Rheinland certifies those monitors. So they certify PWM as "flicker-free"...