Dacryocystorhinostomy (DCR) is a surgical instrument set is a combination of 16 instrument designed by Modern Surgical to treat nasolacrimal duct obstruction, a condition causing excessive tearing (epiphora) and recurrent infections. The goal of DCR is to create a new tear drainage pathway between the lacrimal sac and the nasal cavity, bypassing the blocked duct. The surgery can be performed externally through a small skin incision near the nose or endoscopically through the nose, which leaves no visible scar. During the procedure, a portion of the lacrimal bone is removed to connect the lacrimal sac directly to the nasal mucosa, allowing tears to drain properly into the nose.