What tests can help diagnose a blocked tear duct?

What tests can help diagnose a blocked tear duct?

To diagnose a blocked tear duct, your healthcare provider asks about your symptoms. Your provider may also use tests that examine the eyes and nose, including:

• Tear drainage test: Your provider places one drop of dye on each eye. If the dye does not drain from your eye, it could mean you have a blocked tear duct.
• Eye imaging: Your provider puts a special, safe dye in your eye. This dye travels through your tear drainage system. It shows up on an X-ray, CT scan or MRI to help your provider find the blockage.
• Irrigation and probing: Irrigation uses a fluid to clean out your tear ducts. Your provider may insert a small instrument through the corner of your eye to find the obstruction.