I have migraines every once in a long while where I lose the ability to read. I can sound out words and recognize them but can't grok the meanings of the simple

I have migraines every once in a long while where I lose the ability to read. I can sound out words and recognize them but can't grok the meanings of the simplest sentences. Every thing else is fine. I can speak and reason perfectly. Just not read. It is the weirdest thing I've ever experienced. I definitely have more compassion for illiterate people making their way in life.