How long after a vitrectomy does it take for the gas bubble to absorb and vision to return?

6-12 weeks. If the gas fill is 100%, the average rate of gas absorption is about 10%/week. Some patients will have complete resorption in 8 weeks and some as long as 12 weeks. Usually patients will begin to be able to see letters when the gas bubble is 45% or less (the macula is no longer covered by the gas that reflects light away). Best visual acuity is not realize until about 3 months after surgery.