I believe that I would have been diagnosed as dyslexic if I had been schooled nowadays, I could write long essays and read them through to myself and they made perfect sense, yet when they came back from marking, whole sentences and paragraphs could be missing, yet I had clearly checked the work and read them in while checking, for my brain they were there, even if I had just thought I had written them, thus nowadays i am at the mercy of the built in spoil chucker that comes in all software these days.
My problem was despite this I managed to get into a Grammar school and pass exams, and we have found the same with my daughter, who was actually diagnosed as dyslexic once she attended university. she like me read voraciously when younger, so because we had a good reading ability the problem was masked, to this day I still get my i before e's muddled.