This looks like the regular AMOLED 60 Hz flicker I see on my smartphone (Oneplus 3). It is not bothering me. But whenever I set the brightness too low, the flicker changes to 240 Hz, and then I get eye strain quickly.
This is how it looks on my smartphone:
It looks almost the same both in shape and amplitude. The closer I put the sensor to the display (it was very close), the larger the dips in brightness. I think this flicker is caused by the display's refresh rate (60 Hz).
You can not be sure to what exactly you're sensitive unless you can rule specific factors out by trial and error. If you buy a device that has a display, and it's causing eye strain, it is very difficult to isolate those factors.
If you're sensitive to flicker in general, you could have problems with different kinds of room lighting, too.
I believe there are 3 factors for eye strain and other symptoms (e.g. headaches):
- spectrum (esp. White LED)
- pixel flicker (temporal dithering, FRC, the way certain programs update their surface)
- light flicker (backlight, frontlight, room lighting)
If you have spectrum issues, you need to turn most display's brightness way down because it hurts over time. You probably would also have issues with LED room lighting. I haven't read the review much enough to figure out which display technology exactly the device in question uses, but if it uses 3 color OLED (not White OLED), I think that would be a good sign.
If you have pixel flicker issues, with an otherwise perfectly usable display it can hurt to look at a specific operating system's or graphic card's display output or to look at specific apps/programs only. You probably would know by now, as this problem has been prevalent in Windows 10, in major web browsers, Android, some gaming consoles, and Linux.
If you are affected by light flicker in general, you most certainly would know it already. You could have trouble with flickering LED lights, compact fluorescent lamps, even incandescent lights. The flicker ranges that can cause symptoms go from 50 Hz up to 20 kHz and even higher. The light's size may not matter - you could be affected by small displays or large overhead room lighting.
Please note this is mostly based on my personal experience, and there's still much to be figured out. Not everything adds up yet.
However, what's clear is there are so many major and minor factors that it's very difficult to find out where individual eye strain is coming from. Ideally, to know if you're sensitive to a specific display's flicker, there would be a safe brightness level where there's no flicker whatsoever (sometimes at 100% brightness only) so you can switch back and forth and become sure that the flicker is causing the issues. But that's rarely the case, and it seems this particular device always flickers.
What rtings doesn't show is the low brightness flicker. Just showing 2 pictures, one at 50% brightness and one at 0%, is not gonna cut it. The real flicker usually starts at lower brightness levels. This display is rated at 600 nits, which is pretty bright, so a brightness of 50% may still be too bright for regular use.