At what level in resolution (4k, 8k, etc) is something higher resolution than average human eyes max out at and why?
In: Biology
So here’s the actual answer: under motion we can see at a general maximum of 120 “pixels” per degree of vision, at the center of our vision.
For those wondering why it’s not 60 pixels like the eye charts seem to say, that’s because it’s a line “pair” that can be distinguished, thus 2 samples and not 1.
Thus what really matters is how much of your vision is taken up be the screen. Which should be obvious, smash your face against a 4k screen and of course you’ll see the pixels.
Thus, if you have a screen that takes up 60 degrees of view, really big tbh, an 8k screen is indeed needed to “match”your eye resolution. It’s a little over but whatever. The whatever part comes from another fun fact that if you are looking at a still image your visual acuity along a given axis increases by around 70% further still, in under a second.
PS, for all the wrong answers here, this really wasn’t hard to find: https://en.m.wikipedia.org/wiki/Visual_acuity
Follow up question if I may, what resolution per eye is needed for perfect VR vision? Or at what point you will not spot the difference? Is it bigger than 8K?
Tl;dr, with today’s tech 8K would do it.
As far as resolution goes (aside from other aspects of the visual experience) there’s two competing limits: visual acuity (the smallest detail the eye can resolve) and field of view (the breadth of view that the eye can take in. Both are measured in units of angle so trigonometry comes into the picture.
Messing around with [Carlton Bale’s home theater calculator](https://carltonbale.com/home-theater/home-theater-calculator/), using a 65″ 8K monitor from 3-1/2 feet away (oof) you would be able to see the entire screen while looking anywhere on the screen (wide enough field of view) and also be unable to discern individual pixels (high enough resolution).
I may be incorrect, as I’m no expert, but I believe its less about resolution and more about PPI (Pixels Per Inch) density in relation to distance and screen size. A 27″ 1080p panel and a 55″ 4k panel are going to look roughly similar in crispness if they’re both good quality and you’re viewing them from your respective proper distances. On top of that, a 70″ 4k panel is likely to look lower resolution than a comparable 55″ 4k, due to the inherent difference in pixel density because of the larger screen. A good way to think about it is with the screens at sports stadiums. They look pretty crisp since you’re usually a thousand-or-so feet away, however because they only made it high enough resolution to be clear from long distance, up close you can basically count the pixels.
There are two different answers here depending on what you’re looking for. There’s pixel resolution and aliasing resolution. Cell phone screens and most tv’s now have dense enough pixels (colored dots) that at regular viewing distances you can’t make out individual pixels.
Pixel size isn’t the only thing your eye can see though. You actually have a much better ability to see aliasing (trying to represent a smooth curved object like a hanging powerline with pixels arranged in straight lines, leading to what appears as jagged lines). Because of this, image quality can still slightly improve by increasing resolution past 4k and likely 8k, but that depends on how far you sit from the screen.
Watch If Your Eye was a Camera What Would the Specs befrom the [Corridor Crew](https://www.youtube.com/channel/UCSpFnDQr88xCZ80N-X7t0nQ), they had a real nice video about it
[https://www.youtube.com/watch?v=sPpAXMH5Upo](https://www.youtube.com/watch?v=sPpAXMH5Upo)
Think about it like this: it’s less about the resolution, and more about how close you are to the display and how large the pixels are. Even with a 4k display, if it’s a big tv and you stand up against it, you’ll be able to see the individual pixels.
As resolutions get higher, the pixels are more likely to be imperceptable by a typical person at a typical viewing distance from a typically sized tv. This is why some people say they are already content with 4k or 1080p.
I suspect that 8k will max out what most people can see in a normal living room setup.
Others in here have already answered your question, so I’ll just leave [this chart](https://i.redd.it/edwvvvjlwyt41.jpg), which illustrates the relationship between screen size and resolution. I’ve used some version of this any time I’ve bought a new monitor or tv over the past decade.
You’ll see that 2k+ is of* dubious value for most people’s TVs unless they have a pretty big screen or sit very close. Monitors are a different story, obviously.
Edit: u/JeansAndAPolo provided a better link. Use this one: https://www.displayninja.com/wp-content/uploads/2018/05/best-tv-for-monitor.png
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