[robluxus]

> all the way up to a visual mental concept of it that does everything but actually block your field of vision.

That does sound like it would put an upper bound on what "seeing with your minds eye" means, but then what about this line from GP above:

> daydreaming has a weird effect of completely blocking out my vision.

This was claimed by a person who also self-reports aphantasia, and I (as a person that claims to NOT have aphantasia) just can't imagine (pun intended) how this would work.