Not OP but... There isn't a scientific diagnosis, it's more of a self observation kind of thing right now. The reason is that there has been very little resear

Not OP but... There isn't a scientific diagnosis, it's more of a self observation kind of thing right now. The reason is that there has been very little research into it so far. You may notice that the wikipedia article is extremely short and most of the references are news articles, opinion pieces, and blog entries. Personally, I've found that the realization has offered slightly new ways of approaching life. It's fun to explain to people how I think and how that may differ from them. Nothing truly changed except perspective. For reference, I also think mostly in directed graphs. I'm also able to roughly draw a shape in my head, but its very quickly erased and is hyperlocal, like trying to draw in the air with a sparkler. There is a subreddit, r/aphantasia, but I've found that it's mostly a mix of curious gawkers and bitter people claiming that having it has somehow deprived them of essential life experiences.