<prompt> A 60 year old man presented with watering from his left eye since 1 year. Syringing revealed a patent drainage system. Rest of the ocular examination was normal. A provisional diagnosis of lacrimal pump failure was made. Confirmations of the diagnosis would be by-DacryoscintigraphyDacryocystographyPressure syringingCanaliculus irrigation test  <response>: Following tests are available for evaluation of epiphora:For mechanical obstruction:-Regurgitation test, fluorescein dye test, lacrimal syringing test, Jones dye test, dacryocystography.For functional physiological obstruction due to lacrimal pump failure:-Dacryoscintigraphy or radionucleotide dacryocystography more sensitive, Fluorescein dye disappearance test. 