Joshua T. Katz in The Hedgehog Review:
When my daughter was born last year, I was fifty-three years old. I’d wanted a child so badly for so long, and her arrival may well be the most wonderful thing ever to happen to me. And yet I cannot picture her first breath, though I witnessed it from inches away. I also cannot picture her right now, as I type these words. Or my wife. Or my parents. Or my friends. Or my daughter’s nursery at home. Indeed, I have no real idea what the verb “to picture” is supposed to mean.
How, after all, could I possibly picture what is not in front of me?
I say: After all. That is because I have aphantasia. I lack a mind’s eye. If you ask me to describe someone I cannot see at that moment, or something, I have no idea how to do it since my mind forms no pictures. The idea that a mind could form pictures is, to me, science fiction.
More here.