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Basics

• Summary
• Diagnosis and Tests
• Treatments and Therapies

Learn More

• Specifics
• Genetics

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Research

• Clinical Trials
• Journal Articles

Resources

• Reference Desk
• Find an Expert

For You

• Children
• Patient Handouts

Summary

You may only think of tears as those salty drops that fall from your eyes when you cry. Actually, your tears clean your eyes every time you blink. Tears also keep your eyes moist, which is important for your vision.

Tear glands produce tears, and tear ducts carry the tears from the glands to the surface of your eye. Problems with the tear system can include too many tears, too few tears, or problems with the tear ducts. Treatment of the problem depends on the cause.

Diagnosis and Tests

• Eye Problems: Symptom Checker Flowchart (American Academy of Family Physicians) Also in Spanish

Treatments and Therapies

• Choosing Wisely When It Comes to Eye Care: Punctal Plugs for Dry Eye (American Academy of Ophthalmology)
• How to Use Eye Drops (American Society of Health-System Pharmacists)
• Tired, Achy Eyes? Finding Relief for Eye Discomfort (National Institutes of Health) Also in Spanish

Specifics

• Blocked Tear Duct (Mayo Foundation for Medical Education and Research) Also in Spanish
• Canaliculitis (Merck & Co., Inc.) Also in Spanish
• Dacryocystitis (Merck & Co., Inc.) Also in Spanish
• Dry Eye (National Eye Institute) Also in Spanish
• What Is Dry Eye? (American Academy of Ophthalmology) Also in Spanish

Genetics

• Triple A syndrome: MedlinePlus Genetics (National Library of Medicine)

Clinical Trials

• ClinicalTrials.gov: Dry Eye Syndromes (National Institutes of Health)
• ClinicalTrials.gov: Lacrimal Apparatus Diseases (National Institutes of Health)

Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)

• Article: Potential Prognostic Protein Biomarkers in Tears From Noninfectious Uveitis Patients Under...
• Article: Evaluation of ocular surface inflammation and systemic conditions in patients with...
• Article: A comparative study on the lipid layer thickness analysis of medical...
• Tears -- see more articles

Reference Desk

• NEI for Kids: Glossary (National Eye Institute)

Find an Expert

• Find an Ophthalmologist (American Academy of Ophthalmology) Also in Spanish
• Finding an Eye Doctor (National Eye Institute)
• National Eye Institute

Children

• Nasolacrimal Duct Obstruction (American Association for Pediatric Ophthalmology and Strabismus)
• Surgery for Tear Duct Blockage (Nemours Foundation) Also in Spanish
• Treating Tear-Duct Blockage (Tear Duct Massage) (For Parents) (Nemours Foundation)
• Treating Tear-Duct Blockage (Tear Duct Probe) (For Parents) (Nemours Foundation)

Patient Handouts

• Blocked tear duct (Medical Encyclopedia) Also in Spanish
• Dry eye syndrome (Medical Encyclopedia) Also in Spanish
• Watery eyes (Medical Encyclopedia) Also in Spanish