My dad used to work with all kinds of people who had brain damage through strokes and accidents. I earned my first money programming software to help these people to improve their cognitive abilities like calculating and reading.

The best reading training was a kind of side scroller which scrolled a text from right to left. You could adjust speed, font, fontsize and the actual text.

This was in the 90s, so I don’t know if there is a program like this now, but it should be easy to build something with JavaScript in the browser.

Slurring speech, mixing words and characters jumping around when you're reading. Does it also feel like you get into reading mechanically where you read each word but don't actually connect the words into sentences?

This happens to me a lot. It's stress related. If I'm really under pressure or burnt out I put 110% effort in and get stuck. That builds impatience with myself and that burns me out even more.

I go through periods when I can't learn a thing I'm just too wired on stress hormones. It normally takes a few months of doing mindless things to come back to normal. Physical work or basic repetitive admin tasks seem to be the best for clearing the burn out. Anything that doesn't require mental clarity or learning but still provides a sense of achievement.

I went from a period where I seriously struggled to learn things like one new git command to picking up functional programming in F# with ease.