If you’re constantly dabbing at watery eyes, the cause might be a blockage in your tear drainage system. Tear Drainage Testing, also known as syringing or probing, is a straightforward diagnostic procedure performed by our oculoplasty specialists to pinpoint the exact location of the problem. This test helps us understand why your tears aren’t draining properly and determines the most effective treatment plan for you.
What is a Tear Drainage Testing (Syringing / Probing)?
Tear drainage testing is a simple, in-office procedure that evaluates the patency of the lacrimal (tear drainage) system. It involves gently flushing a sterile saline solution through the tear ducts, which run from the inner corner of your eyelids to the inside of your nose. If the system is clear, the fluid will drain normally; if there is a blockage or narrowing (stenosis), the fluid will be obstructed. Probing may also be used, where a very fine, smooth instrument is passed through the ducts to feel for the obstruction.
Why is this test performed?
Your ophthalmologist at Pristine Eye Hospitals may recommend this test to investigate the cause of:
Persistent Epiphora: The medical term for excessive, chronic watery eyes that are not caused by sadness or irritation.
Recurrent Eye Infections: Blocked ducts can lead to a buildup of bacteria, causing repeated infections like dacryocystitis (infection of the tear sac).
Suspected Tear Duct Obstruction: To confirm and locate a blockage in any part of the tear drainage pathway, from the eyelid opening (punctum) to the nasal cavity.
Pre-Surgical Evaluation: To assess the drainage system before certain eye or eyelid surgeries to prevent post-operative complications.
How to Prepare for Your Tear Drainage Testing (Syringing / Probing)
Preparation for this test is minimal as it is a quick and non-invasive procedure. Our team will ensure you are comfortable and fully informed before we begin.
Please inform your doctor of any medications you are taking, especially blood thinners.
It is best to remove contact lenses prior to the test.
Avoid wearing eye makeup on the day of your appointment.
The Procedure: What to Expect Step-by-Step
The entire process is performed in the examination chair and typically takes only a few minutes.
1. Numbing the Eye: First, we will apply anaesthetic eye drops to numb the surface of your eye and the area around the tear duct opening, ensuring your comfort.
2. Gentle Dilation: The small opening of the tear duct (punctum) in the corner of your eyelid may be gently widened with a small instrument to allow for easy access.
3. Flushing the Duct: A sterile saline solution is gently flushed into the tear duct using a very fine, blunt-tipped instrument called a cannula.
4. Assessing the Drainage: Your doctor will observe where the fluid goes. If it drains successfully, you may feel it at the back of your throat. If it is blocked, the fluid will reflux back out of the eye opening.
Understanding Your Results
The results of your test are available immediately. If the saline solution drains through to your nose and throat without any issue, it indicates that your tear ducts are open and functioning correctly. In this case, your doctor will explore other potential causes for your symptoms.
If the saline solution backs up and spills out of the eye, it confirms a blockage. Based on the location and nature of the reflux, your oculoplastic specialist can determine whether the blockage is partial or complete and pinpoint its precise location within the lacrimal system. Following the diagnosis, your doctor will discuss the best course of treatment, which may include medication, a minor in-office procedure, or a surgical intervention like Dacryocystorhinostomy (DCR) to create a new drainage pathway.
Frequently Asked Questions
Is tear duct syringing painful?
No, the procedure is generally not painful. The anaesthetic eye drops effectively numb the area, so you will likely only feel a slight pressure or a sensation of wetness.
How long does the tear drainage test take?
The test is very quick and is usually completed within 5 to 10 minutes. You can return to your normal daily activities immediately afterwards.
What happens if a blockage is found?
If a blockage is confirmed, your doctor at Pristine Eye Hospitals will explain the findings and recommend the most suitable treatment. Options range from simple massage techniques to advanced surgical procedures to restore proper tear drainage.