From my contemplation and experience,
Vision is to “See through”.
Vision is the act of penetration through the phenomenology of the world,
So as to never lose sight of the essence,
Which is the “ineffable infinite mystery” that underlies all.
Vision comes from transcendence.
The greater the transcendence, the greater the vision.
Vision is the capacity to recognize emptiness (appearances) and no-thingness.
To see that no thing/form is real,
And that the reality underlying things/forms is not a thing at all.
It is to see that every point of perception in your experience,
Is a doorway or window into the infinite.
It is when your light passes through everything,
And is not stopped by anything.