More info about retinal detachment: http://www.webmd.com/eye-health/eye-health-retinal-detachment
For more information on macular hole http://www.nei.nih.gov/health/macularhole/macularhole.asp
Eye Care and Conditions from the American Academy of Opthalmology:
Following a vitrectomy operation, patients must remain in a face-down recovery position, from one day to several weeks. This position allows the bubble to press against the macula and be gradually reabsorbed by the eye, sealing the hole. As the bubble is reabsorbed, the vitreous cavity refills with natural eye fluids.
Maintaining a face down position is crucial to the success of the surgery. Because this position can be difficult for many people, it is important to discuss this with your doctor before surgery and plan ahead to use quality equipment from FDME for your recovery