Editing Vitrectomy (section)

==Outcome==
{{more citations needed section|date=June 2018}}
[[File:Showing eyes post vitrectomy.jpg|thumb|Showing eyes shortly after vitrectomy and removal of bandages]]
The return of eyesight after vitrectomy depends on the underlying condition which prompted the need for surgery. It also depends on patient age and their visual acuity before surgery. For example, if the eye is healthy, but filled with blood, then vitrectomy can result in return of [[Visual acuity|20/20]] eyesight. With more serious problems, such as a retina which has detached several times, final sight may be only sufficient to safely walk ([[ambulatory vision]]) or less.

With a [[retinal detachment]], some very important considerations are how long the retina has been detached, and what part of the retina was detached. For example, if the [[macula]] of the retina comes off too, outcomes might not be as good as they would if the macula was still attached. Also, the longer the time between the detachment and the reattachment, the worse the outcomes. Some ophthalmologists believe that if a patient has a retinal detachment that involves the macula and it has been longer than 6 months, then a vitrectomy for that patient is unlikely to help. However, recent studies have shown that visual improvement might still be found in these patients. Given the high variability between outcomes for different patients with retinal detachments, it is very important to be examined by an ophthalmologist as soon as possible.

A Cochrane review found vitrectomy for patients with idiopatic macular hole improved visual acuity by about 1.5 lines on an acuity chart. Macular hole closure was 76% in those treated with vitrectomy compared to 11% in those observed.<ref name="Parravano"/>