Your vision is a precious gift and well worth every moment spent in the face-down recovery process after vitrectomy surgery. Since the development of this sight-saving surgical technique, thousands of people suffering from macular and retinal problems have recovered fully and regained their sight completely. But the surgical procedure counts for only half of the ultimate success of the surgery. The other half is dependent on the patient's compliance with the face-down (or prone) positioning required after the surgery, which usually ranges from one to two weeks in duration.