| | Hi.
The vision sense is an extremely dominant sense. That sense is perceived to be spatially located at the eyes, since that's where it originates. Thoughts are also represented mostly somewhere in a space we perceive to be "around or in the head." All "whys" aside in regard to why those are perceived as they are; this is why, pre or post enlightenment, a "locust of being" or "awareness" is located behind the eyes.
This itself is not a problem and cannot really be shut off. The perception may be altered, in such cases as enlightenment wherein the "separate watcher" is dissolved (but not "head-awareness"), or a hard jhana where most things disappear. But, other than that and some other states, the eye-sense cannot be turned off (only covered), and thoughts also will continue on. Thus, the two primary phenomena that constitute an awareness located at the head (whether perceived dually or non-dually) are persistent and not a problem. It's just how the senses are naturally organized and perceived.
Now, with strong concentration, we can project or manipulate "awareness" to other senses, narrow in on other senses, etc and thus feel as though awareness is actually "there" rather than "the head/eyes." In any case, "awareness" is never anywhere specific, because space itself is only a perception based on an arbitrary center point.
In conclusion: the perception of a "head based awareness" isn't an "insight issue," but if you want to play around with projecting/manipulating that perception, you just need stronger concentration and more practice. Perhaps practice with visualization in the Siddhi sense, or samatha in the sense of strengthening concentration so that you can hone in on the sense or perceived locality that you desire. Vipassana can lead to some things like this too.
Trent |