Lacrimal
Lacrimal System
Treatment of blocked tear ducts, chronic tearing, dacryocystorhinostomy (DCR), and lacrimal infections — adult and pediatric.
Medically reviewed by Thomas C. Spoor, MD, FACSOculoplastic SurgeonLast updated June 2026
The Lacrimal System
The lacrimal system is the eye’s tear apparatus — the glands that produce tears and the channels that drain them away. With every blink, a thin tear film is spread across the surface of the eye, keeping it lubricated, optically clear, and protected against infection; the used tears then drain through tiny openings at the inner corner of the eyelids, down through the tear sac and nasolacrimal duct, and into the nose. Because this single system both makes and removes tears, the problems that arise fall into two broad groups: insufficient tears or an unstable tear film, which leaves the eye dry, gritty, and irritated, and impaired drainage, which causes a constantly watering eye (epiphora), mucous discharge, and recurrent infection of the tear sac (dacryocystitis). The sections below follow the tears along this pathway — from how they drain, through the relevant anatomy, to the evaluation and surgical treatment of blockage.
The lacrimal system produces, distributes, and drains tears. A healthy tear film is essential for corneal health, clear vision, and comfort. When any part of the drainage pathway is blocked, tears overflow onto the cheek (epiphora), stagnate in the drainage sac, and become a reservoir for infection.
How Tears Drain
- The lacrimal gland (upper outer orbit) and accessory glands produce the aqueous tear layer
- Blinking sweeps tears medially toward the inner corner of the eye
- Tears enter the puncta (small openings at the inner corner of each eyelid), travel through the canaliculi, and collect in the lacrimal sac
- From the sac, tears drain through the nasolacrimal duct and exit under the inferior turbinate in the nose (valve of Hasner)
Symptoms of Obstruction
- Excessive tearing (tears spilling over the eyelid margin — epiphora)
- Mucous or purulent discharge, especially in the morning
- Recurrent red eye or conjunctivitis
- Painful, swollen inner corner of the eyelid (acute dacryocystitis)
- Secondary skin changes or maceration of the lower lid skin
For a detailed overview of lacrimal anatomy, see the Anatomy Overview or the dedicated Lacrimal Anatomy page.
Lacrimal Anatomy
Understanding the anatomy guides both the diagnostic work-up and the choice of surgical repair. The drainage system has several potential sites of obstruction:
- Punctal stenosis: the opening is too small or closed; common in elderly patients and after topical medication use
- Canalicular obstruction: the canaliculi (upper and lower) may be scarred by infection, trauma, or chemotherapy agents (especially 5-FU and docetaxel)
- Common canalicular obstruction: where the upper and lower canaliculi join before entering the lacrimal sac
- Nasolacrimal duct obstruction (NLDO): the most common site; the duct narrows or occludes at or just above the valve of Hasner
Explore the Lacrimal System
Tear-drainage problems range from a simply watery eye to blocked ducts, infections, and injuries. Explore each in depth:
Watery Eye & EvaluationWhy the eye waters (epiphora) and how tearing is evaluated.Learn more →
Blocked Tear Duct & DCRNasolacrimal duct obstruction and dacryocystorhinostomy surgery.Learn more →
Congenital (in Children)Blocked tear ducts in babies — massage, natural resolution, probing.Learn more →
Infections & TraumaDacryocystitis, canaliculitis, and canalicular-laceration repair.Learn more →
CanaliculitisInfection of the tear-drainage canaliculus — the “pouting punctum” and its surgical cure.Learn more →
Symptoms of a Blocked Tear Duct
Tears are made above the eye and drain through tiny openings (puncta) into the nose. When that drainage pathway is blocked, tears back up and symptoms appear:
- Constant watering and tears spilling onto the cheek (epiphora)
- Sticky discharge, mattering, or crusting
- Recurrent eye or eyelid infections
- A tender, red swelling at the inner corner (dacryocystitis) — an infected tear sac needing prompt treatment
- Blurred vision that clears when you blink the tears away
Common Causes
Blockage can occur anywhere along the drainage path: age-related narrowing of the tear duct, chronic inflammation or infection, prior trauma or sinus surgery, canaliculitis (an infection of the tear channel), tumors, or — in babies — an incompletely opened duct (congenital tear-duct obstruction). Poor eyelid position or laxity can also cause tearing without a true blockage.
How It Is Evaluated
An oculoplastic surgeon distinguishes a drainage blockage from overproduction. See our Watery Eye Evaluation page for the full work-up, which may include irrigation and probing of the tear ducts, dye tests, and imaging to locate the level of obstruction.
Treatment Options
- Dacryocystorhinostomy (DCR): the definitive surgery for a blocked nasolacrimal duct — a new drainage pathway is created between the tear sac and the nose, done externally or endoscopically. See Blocked Tear Duct & DCR.
- Punctal or canalicular procedures: opening or stenting narrowed puncta and canaliculi.
- Massage and probing: first-line for infants, most of whom open on their own or with a simple probing.
- Treating infection: acute dacryocystitis needs antibiotics, and often surgery once settled. See Lacrimal Infections & Trauma.
Choosing a Surgeon
Tear-drainage surgery is a core part of oculoplastic practice; an ASOPRS fellowship-trained surgeon can pinpoint the level of blockage and choose the right repair. Find one in our surgeon directory.
Continue Reading — Complete Tear-Duct & Lacrimal Guide
Frequently Asked Questions
- What causes a blocked tear duct?
- The most common cause in adults is involutional stenosis — gradual narrowing of the nasolacrimal duct with age. Other causes include infection (dacryocystitis), trauma, nasal or sinus surgery, certain eye drops (glaucoma medications), and inflammatory diseases. In infants, blocked tear ducts are usually due to a membrane at the lower end of the duct that fails to open at birth.
- What is DCR surgery?
- Dacryocystorhinostomy (DCR) is the surgical bypass of a blocked nasolacrimal duct. A new drainage opening is created directly between the lacrimal sac and the nasal cavity, bypassing the blocked duct entirely. DCR can be performed externally (through a small incision beside the nose) or endoscopically (through the nose, with no external incision).
- What is the success rate of DCR surgery?
- External DCR has long-term success rates of approximately 90–95%. Endoscopic DCR has similar success rates in experienced hands. Most patients experience complete relief of tearing after surgery.
- Can a child's blocked tear duct resolve without surgery?
- Yes — up to 90% of congenital nasolacrimal duct obstructions in infants resolve spontaneously by 12 months with massage and topical antibiotics for infections. If the obstruction persists at 12–18 months, a simple probing procedure is performed under brief anesthesia.
- What should I expect during my lacrimal system consultation?
- During your consultation, Dr. Spoor will review your symptoms, examine your eyes and tear drainage system, and may perform diagnostic tests such as dye tracing or imaging to identify the exact location and cause of the blockage. They will discuss your treatment options, explain the recommended procedure, and answer any questions about what to expect before and after treatment. This appointment helps ensure you're a good candidate for surgery and allows you to make an informed decision about your care.
- What is the recovery timeline after lacrimal surgery?
Your Surgeon
Thomas C. Spoor, MD, FACS
Michigan Neuro-Ophthalmology & Oculoplastics
🏅 ASOPRS Fellowship Trained