Someone who has been blind since birth, but then has an operation to give them sight doesn't need a preconceived notion of how things look, to be able to see those things.
That has to do with *how* our physical world works. When their eyes "start working" again, light pours in and the brain does it's job.
The same may be true in the other dimensions. Seeing after all is just a perception of differing energy fields. In the dense environment of physical reality we require eyes to perceive visually, but perhaps not in the higher-vibrational realities. So they would probably simply see what's around them minus the personal visual constructs which sighted people seem to add to their astral environment. Maybe.
The Astral works slightly different in that it reacts to our perceptions and ideas to show us what we want to see. This is where the "blind from birth" person would have issues. They have very little perception or ideas as to what the world around them actually looks like.
For example... hand a blind person an Orange and tell them to tell you what it looks like.
That is what an orange will "look" like to them on the Astral.
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