I read a study that put people in a dark room with a strobing LED and told them to dart their eyes left and right. 1000Hz was the limit before everyone stopped seeing glowing dashes and saw a solid line streak instead.
I was researching this because I was wondering how fast you can make LED flicker for lighting effects before it looks like constant brightness.
I found most of the information on Wikipedia[0], and the limit seems to be at about 80hz, but together with movement, some people can see stroboscopic effects up to 10khz.
I’m reminded by an old Microsoft input research video, where 1ms latency response is what is needed for the most lifelike response for touch drawing on a screen: https://m.youtube.com/watch?v=vOvQCPLkPt4
