title: Fluorescein oropharyngoscopy.
abstract: To evaluate patency of the lacrimal system, fluorescein was instilled in the conjunctival cul-de-sac and the posterior oropharynx was examined with ultraviolet light. In 20 normal patients fluorescein was evident in one to 30 minutes. In cases of complete nasolacrimal duct blockage no fluorescein appeared after two hours.
mesh_terms: D000293:Adolescent; D000368:Aged; D004724:Endoscopy; D005260:Female; D005452:Fluoresceins; D006801:Humans; D007767:Lacrimal Duct Obstruction; D008297:Male; D010614:Pharynx
chemical_list: D005452:Fluoresceins