AAO 2019 Video Program

    External dacryocystorhinostomy (DCR) is the most commonly performed surgical procedure for acquired nasolacrimal duct obstruction worldwide. The variations in nasolacrimal anatomy and the tendency to bleed often make it difficult for the novice surgeon to understand the anatomical landmarks. This video combines the demonstration of basic steps of an external DCR with identification of muscle and bony landmarks on a skull model. Surgical steps such as correct preoperative nasal packing and ostium creation are depicted on skull models in addition to the live surgery. This aids in better understanding of the nerve blocks and nasolacrimal anatomy pertinent to DCR surgery.