I was wondering if I could've caused permanent irreversible damage to my eyes by using them too much at once? I tried focusing on reading blurry text(it was moving fast on the screen) and during so my eyes have gotten blurry and tired. It goes away, but as soon as I use a monitor they get much more easily fatigued than they got before. I wonder if this reading of fast moving text (which got blurred out because of the speed it was moving in) could've caused permanent damage of some sort? I'm experiencing and inability to focus properly without some sort of blur for my eyes now, is this just the muscles that need to relax completely for a couple of days or?

To put things into perspective; it's like trying to read what a sign is saying through the window of a moving train up close by forcing your eyes to focus on the one spot with the text through the blur (basically ignoring it).