Swab (Eye)
An eye swab test identifies infections affecting the surface of the eye. It is used when symptoms such as discharge, redness, or irritation persist.
Turnaround time
2 days
Biomarkers count
1
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Details about Swab (Eye)
What is the Eye Swab Test?
An eye swab test involves collecting a small sample of discharge or cells from the surface of the eye using a sterile swab. The sample is analysed in a laboratory to identify bacterial or viral organisms causing infection.
This test is commonly used to investigate conjunctivitis, keratitis, blepharitis, and other ocular infections. It helps distinguish between infectious and non-infectious causes of eye inflammation.
Eye swab testing is particularly valuable when symptoms are severe, recurrent, or not responding to initial treatment.
Why do I need an Eye Swab test?
Eye infections can spread quickly, affect vision, or become chronic if not properly identified. Many eye conditions share similar symptoms, making laboratory testing important for accurate diagnosis.
You may need this test if you experience:
- Red or inflamed eyes
- Eye discharge or crusting
- Pain or discomfort in the eye
- Itching or burning sensation
- Sensitivity to light
- Blurred vision
- Recurrent or persistent eye infections
- Eye symptoms affecting one or both eyes
Testing helps identify the cause and supports appropriate clinical follow-up.
Benefits of the test
- Accurate infection identification
Determines the cause of ocular symptoms. - Differentiates bacterial and viral causes
Supports appropriate management decisions. - Useful for persistent symptoms
Helps when symptoms do not resolve as expected. - Protects eye health and vision
Early identification reduces risk of complications. - Non-invasive procedure
Quick and gentle sampling process. - Supports treatment review
Helps assess why symptoms may be recurring. - Useful for unilateral or bilateral symptoms
Applies to infections in one or both eyes. - Reduces unnecessary interventions
Avoids misclassification of eye conditions.
Step-by-step: How we offer testing
Clinic-based testing (UK-wide)
- Choose your nearest UK clinic
- Attend your appointment
- A clinician takes an eye swab
- Sample is sent to the laboratory
- Results are issued once analysis is complete
Home or hotel visit (+£60, UK-wide)
- Book a mobile clinician
- Eye swab taken at your home or hotel
- No clinic visit required
- Sample securely transported to the laboratory
Your results explained
Negative (no infection detected)
- No pathogens identified
- UK standard: Not detected
- Suggests symptoms may be non-infectious
Low-level detection
- Small quantities of organisms identified
- UK standard: Low positive / equivocal
- May reflect early or resolving infection
Positive (infection detected)
- Pathogen identified from the eye sample
- UK standard: Organism reported by name
- Indicates active ocular infection
How It Works
Simple steps to get your results
Book Online
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
Visit or Test at Home
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
Get Your Results
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
Take control of your health with London Blood Tests
WhatsApp UsHow to Prepare for Your Test
Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.