Blocked tear duct — Comprehensive overview covers symptoms, causes, treatment of this eye disorder. Sep 27, · The blocked tear duct in adults is due to an infection or tumor in the eye. Know the causes, symptoms, treatment of blocked tear duct in adults. Occupation: MD,FFARCSI. A blocked tear duct prevents tears from exiting the eye properly. Tear ducts are the Compelling Content · Latest Health Articles · Wellness and Fitness NewsService catalog: Anemia, Alzheimers, Appendicitis, Bipolar Disorder, Bronchitis.