So when someone is dyslexic, the main thing that is going on is that their eyes move around a lot and take in information about their surroundings in great detail. So they know right away if something is out of place, but they can't stop their eyes from moving around like that even when they try to read.
I can read text and intricate diagrams well, and I have good eyesight with my glasses on. But even when I'm really trying to be mindful of my surroundings, I process very little visual information. Months ago my mom visited and put a wreath on my front door, but I didn't know it was there until she visited again a couple weeks ago and mentioned it. Theoretically my eyes point at that door