Stem cells from one's own eye can bring new sight to those blinded by burns.
http://news.yahoo.com/video/health-15749655/medical-breakthrough-restoring-sight-to-the-blind-20498197 (http://news.yahoo.com/video/health-15749655/medical-breakthrough-restoring-sight-to-the-blind-20498197)
Idk if you say it is cured, more or less fixed in a few inviduals.