When I meditate I focus on that entire area--think of an observatory, where the opening for the telescope goes from the zenith to partway down the wall of the observatory, a segment of a circle.
Hey! I like that one David - very suggestable.
Just casually I would think that, yeah, we see as Richard put it, in "stereo-scopic" terms through the astral eye because our brains all already set up to see that way by default - so its just a carry over...
"Look deep into nature, and then you will understand everything better" -Albert Einstein