What to expect from allergy testing for allergic conjunctivitis

A clinician may choose a skin-prick test or a blood test based on your history, medicines and skin condition. Testing can look for sensitivity to triggers such as pollen, house dust mites, mould or animal allergens. A positive result shows sensitisation, not that the trigger definitely caused every episode of eye irritation. Red, itchy, watery eyes may also have non-allergic causes, so an eye examination remains relevant.

Write down when symptoms begin, where you were, possible exposures, and whether one or both eyes are affected. Bring a list of medicines, including antihistamines and eye drops. Some medicines can affect skin-test results, so ask the testing service whether any should be paused; never stop a prescribed medicine without instructions. After testing, follow the clinician’s advice about trigger avoidance and symptom treatment.

Testing is not a substitute for urgent assessment. Seek prompt care for severe eye pain, reduced or blurred vision, marked light sensitivity, an injury, or a strong one-sided reaction. Get emergency help for breathing difficulty or swelling of the lips, tongue or throat during or after testing. Contact the clinic if the test site develops extensive swelling or symptoms that concern you.

Ask which test is appropriate, whether medicines affect it, what a positive result means for your eyes, and how results will change your treatment plan.