At what level in resolution (4k, 8k, etc) is something higher resolution than average human eyes max out at and why?
In: Biology
Eye-limiting resolution is about one arc-~~second~~minute†. That means that when you have a 60 x 60 pixel patch that’s 1˚ by 1˚, that’s the most a person with 20/20 vision can distinguish.
So, your 4K display has 2160 lines vertically. So if you sit far enough back that the height of the TV is 36˚ tall, then the 4K display has eye-limiting resolution. However, the human field of view is 135˚ by 120˚, so it takes a lot of pixels to cover that. The eye doesn’t have its best resolution everywhere, so you could make a special eye-like display with lots of pixels in the middle and fewer pixels in the periphery, but that would be super difficult to make. The very agile muscles that rotate the eyes are also a problem for this scheme.
Edit: † There was a typo in this line, it should be arc-minute, as I used in the other calculations. Sorry.
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