Typically with a vitrectomy, fluid in the eye is replaced with a silicon solution, or is replaced for a period of time and then removed; a gas bubble is typically also introduced to the eye to maintain pressure and shape (and relation of internals). Secondary surgery is required to remove solution is some cases, but not all. Each surgery carries with it risk of complications, as I'm sure you're aware.
With the eye work, extended bedrest may be required; depending on what's been done. PVD brings with it the risk of a retinal separation or tear. In the case of a vitrectomy or pneumatic retinopexy, you may need to keep your head in a fixed, semi-elevated position for a period of time, two or three weeks, following surgery, and cannot fly.
If it's something you decide to pursue, be sure to get second, or even third opinions and evaluations, before proceding.