Tear duct probing is a procedure to open a blocked nasolacrimal duct, most commonly in infants with congenital obstruction. A fine probe is passed through the tear drainage system to clear the membrane or blockage.
How Probing Is Done
After dilation of the punctum, a thin metal probe is gently advanced through the canaliculus into the tear sac and down the nasolacrimal duct. Passage into the nose confirms success, and the tract may be irrigated with saline.
- Often performed under brief general anaesthetic in young children
- In adults, probing plus irrigation helps diagnose or treat partial obstruction
- Success rates are high for uncomplicated congenital blocks
- Silicone stents may be added if obstruction is more complex
Aftercare
Mild blood‑stained tears and temporary irritation are common immediately afterwards. Antibiotic or lubricating drops are often prescribed.
- Most infants show gradual reduction in watering and discharge
- Further procedures, such as balloon dilatation or DCR, may be needed if symptoms persist
- Parents are advised on cleaning and observation after probing
- Follow-up ensures the drainage system remains open
