Fistula excision and peripheral grafts in the treatment of persistent limbal wound leaks.

Most small scleral wound leaks at the limbus are treated successfully with suturing, patching, bandage lenses, or cyanoacrylate adhesive, but occasionally a wound leak may continue and a fistula may develop. Although rare, most such fistulas are usually associated with cataract surgery or trauma. Failure of a scleral fistula to close may be due to epithelialization or chronic necrosis of the lumen. In three cases, persistent fistulas of the limbal sclera were excised with a trephine, and a peripheral graft using corneal donor tissue was used to seal the circular defect. This resulted in permanent wound closure and provided a tissue diagnosis of epithelial downgrowth (2 cases) and chronic scleral necrosis (1 case).