I have a quick question about "Vision Center".
Today I found a method whereby you tape a half-folded business card to a mirror. The folded half is facing you, sticking out towards you, straight on. Then you move slightly left or right until the card appears to be exactly centered in your vision, so you can't see either side any more than the other. What I found is that just inside my left eye is where this occurs, however, I am right-handed. Is that normal? I was very surprised by that.
My other question is, if that is the case, is this where I should be dropping over the shot line every time?
In my experience, the most reliable way to find your vision center for pool is to do it at a pool table with balls, in your normal stance position, as demonstrated in this video:
And once you find your pool vision center, it is definitely best to have it aligned with the shot line during your entire pre-shot routine for every shot.