The use of trypan blue to enhance intraoperative visualization during congenital lacrimal fistulectomy.

We describe the use of trypan blue stain to enhance visualization of the tract of the fistula during congenital lacrimal fistulectomy in a 9-year-old boy. This video demonstrates the surgical technique and the intraoperative finding of deep branching of the fistula in this case. We discuss alternative methods of improving delineation of the fistula's path during congenital lacrimal fistulectomy.