The image does move when I look somewhere else but always in the center.
The vitreous is actually cut first then aspirated (sounds better than sucked) out of the eye. There are a lot of posts here by people that have had SF6 or other long acting gas or air put in their eye. The symptoms are varied and bizzard. You can access them with the search feature on this page. Depending on the size of the macular hole, how deep it is and the success of the surgery normal vision is usually NOT obtained although the eye often sees better. Since the image not move with the eye it is not the macula. It is likely the bubble causing it. Cannot offer any other insights to your observations.