How is eye old tear to return a responsibility

Eye old tears can be considered to be caused by conjunctivitis, or lacrimal passage obstruction, can also be considered to be caused by dacryocystitis, need to go to the hospital for examination. If conjunctivitis is caused, you can use antibiotic eye drops for treatment, such as levofloxacin hydrochloride eye drops, tobramycin eye drops, etc.