This can be defined both in terms of anatomical success (a fully reattached retina) and visual success. We tend to measure anatomically success at approximately 2-3 months following surgery with gas, or after the oil has been removed. If your retina were to re-detach then multiple operations may be required for final reattachment. Approximately 99% of retinal detachments can be reattached after multiple operations if needed. Vision can be defined both in terms of central vision and peripheral vision. If your operation is performed soon enough, there is a good chance you will eventually recover central vision that is as good as it was before your detachment. If however, your central retina is detached and there is a delay in prompt treatment, or there is PVR scar tissue, then there is less chance of recovering the same quality of central vision. The longer your retina is detached, the worse the prognosis for central vision, hence underlying the need for prompt consultation and surgery. However, it is important to appreciate the contribution of your peripheral vision in such cases. Even if your central vision could be affected in these cases, surgery is generally very successful in restoring your peripheral vision which is vital in allowing you to navigate and see in the dark. Furthermore, many of these patients report that they are much less aware of any reduction in their central vision when using both eyes, which is generally how we use our eyes on a day-to-day basis.