fighter pilots can see at 1/220 to as high as 1/255 http://amo.net/NT/02-21-01FPS.html from link... "With our outstanding human visual, we can see in billions of colors (although it has been tested that women see as much as 30% more colors than men do. Our eyes can indeed perceive well over 200 frames per second from a simple little display device (mainly so low because of current hardware, not our own limits)." The USAF, in testing their pilots for visual response time, used a simple test to see if the pilots could distinguish small changes in light. In their experiment a picture of an aircraft was flashed on a screen in a dark room at 1/220th of a second. Pilots were consistently able to "see" the afterimage as well as identify the aircraft. This simple and specific situation not only proves the ability to percieve 1 image within 1/220 of a second, but the ability to interpret higher FPS. ----- From the above I go into the world of gaming (the above was just to show - nothing professional). It's possible to see 1/220th or even up to 1/255th (as high as I've heard myself) of a second on a screen from what I understand myself. 240 Hz (up to 240 frames per second) Max I want to say is around 1/300th to 1/350th the human eye can see to me personally, but IDK. That would also probably be someone kind of rare for the most part to me personally or might just have that ability themselves while others struggle to do this especially as you get more frames per second or go into the 300+ realm alone. I'm not a professional or anything like that. This is my theory alone. People say 240 Hz monitors are useless for the most part or many do at least, but I think in a video game situation especially a sniper situation the human eye might pick a frame at 1/240th of a second or 1 frame from 240 in a second on a 240 Hz monitor that helps them to get a perfect (basically) snipe on someone or to be able to snipe someone. https://www.youtube.com/watch?v=-ynOxHDFXx0 ----- I think though 120 Hz / 144 Hz works just fine for gaming, but if you wanted to be in the 240 Hz realm for gaming it might help you out one day in a video game (I'd figure it's rare though if not extremely rare). This is just a theory to as well. It's not meant to be professional just my video game theory and that's it. Figure it could easily help me in rocket league especially when it comes to the ball updating as fast as possible for my eye (human eye) to be able to see it in the air so I can hit it with my car or vehicle. I don't play many shooters myself anymore or it's rare usually. The one shooter I could of used a 240 Hz monitor for would be PUBG (trying to see the invisible bumps while driving the car at max speed). So I can see the invisible bump and don't flip my car and have it explode after driving for 2 minutes to make the next circle as well as being close to the next circle after that (joking). Why the bikes with the bathtub (1940s slang for sidecar) on the side were always the best. This is due to how important the time factor is since hitting the ball wrong could easily mess up the entire play while in the air is how I view it myself personally. My rocket league montage (again). I'm not the best at rocket league (obviously), but I don't have the time to play rocket league for the most part or to play rocket league all the time. Also I forgot to mute the sound while making the video. https://streamable.com/1yprx ----- Side note: I'm at 60 Hz or 60 Frames per second basically with my 4k monitor, but I bought this a year ago when 120 Hz / 144 Hz were really rare for the most part or expensive for that matter. First one didn't come out until May of 2018 and that had a $1,500 price tag or so from what I understand. I bought my monitor in oct / nov of 2018. I'll probably upgrade to a 5k 120 Hz / 5k 144 Hz at some point and stay with that for a while. Probably can get a decent 5k - 120 Hz or 5k 144 Hz monitor / gaming monitor for under $500 that's 32-34 inch in 2 years or so time frame or around here. Might be longer than that, but I'm just waiting until then. I don't have a 5k camera though myself so there's really no point.