Home » Science and Research » Tear-Duct Blockage (For Parents) Tear-Duct Blockage (For Parents) November 2, 2019 Medline-NIH Off Science and Research 000000000000Source: Nemours FoundationRelated MedlinePlus Pages: Tears Read Original Article: Tear-Duct Blockage (For Parents) » Previous: Congenital Cataracts (For Parents) Next: RASopathies (For Parents) About The Author Medline-NIH