<prompt> Dacrocytorhinostomy involves-Opening up the terminal blocked end of nasolacrimal ductConnecting the lacrimal sac to nose by breaking the medial wallComplete excision of lacrimalInseion of drainage tube in the lacrimal sac  <response>: Connecting the lacrimal sac to nose by breaking the medial wall Ref.ak khurana 6th edition pg no 396 