It's interesting that it talks about the flashing possibly triggering epileptic attacks. Although it did say the frequency is generally too high, they were unable to take into consideration how the screen pulsing interacts with frame rate and other flicker/flashing of the operating system and video card technology. It is my belief that all these things interact to produce a flashing rate perceived by the brain that falls in the range that can cause seizures.
But this has been my theory for some time now. The flashing is causing small localized seizures in people without them even realizing it. It's not traditional epilepsy but the mechanism is similar.
The effects of these small localized seizures can be subtle or sometimes not noticeable at all. Ranging from slight mood changes or brain fog, to anxiety or depression. But over time, the constant change in brain activity makes the symptoms and sensitivity increase until almost any artificial light source is triggering.
I've been thinking about this issue for many years and I am convinced the screens are triggering small localized seizures in people. That's also why it takes so long for people to get better, sometimes years. Eye muscles will heal within a week or so and no longer than a month. Your brain takes much longer to reset, often times 6 months to a year after specific trauma. This lines up with what people with significant screen symptoms report.
Just as a final note, I would suggest people try this test if they are able to. Stop using any screen of any type for a few days, preferably more than two days. And take note of your mood and brain function. I promise you that you will feel like a totally new person. Your clarity of thought and mood will be greatly increased. Then return to using screens and take note of how you feel after a day or two of using screens again.