A black eye may take up to 14 days to disappear completely. A black eye is typically not indicative of a serious injury and, like any other bruise on the body, begins to fade after swelling has subsided.
A mild bruise around the eye may disappear within three to five days. To treat a black eye, apply ice to the area immediately, every 15 minutes for a 24-hour period. Apply ice to the affected area for the first several days, and elevate the head while sleeping until swelling subsides. Seek a physician's advice immediately if changes in vision occur, if the swelling does not go down or if there is significant pain.