I feel like if you wanted to properly simulate dyslexia, you would need really precise eye tracking, and make changes to the words while you are not looking at

I feel like if you wanted to properly simulate dyslexia, you would need really precise eye tracking, and make changes to the words while you are not looking at them. Then, if you glance back at the word, it is corrected. I don't have dyslexia (at least not seriously enough that I have ever thought about it) so I was wondering if such a thing would be more accurate to your experiences.