How it works
A long passage is many short, careful pieces, one after another.
Mark your place: slide a ruler or a finger under the line you are typing, then move it down to the next.
Read a small chunk, a phrase or one short sentence, then look at the screen and type just that chunk. Small chunks mean small jumps for your eyes, and fewer places to get lost.
At the end of each sentence, glance at the screen to check it matches. At the end of a paragraph, rest your hands and roll your shoulders.