Eye allergy diagnosis
To provide proper treatment, your ophthalmologist will check to see if you have an eye infection or allergic conjunctivitis. They can usually diagnose allergic conjunctivitis easily. They will use a slit-lamp microscope to check for signs of eye allergies, such as swollen blood vessels on the surface of the eye. They will talk to you about your medical history and your family’s history of allergies.
Your ophthalmologist may test for a specific type of white blood cell in your eye. They will do this if your allergies are bad or if it is not clear that you have allergic conjunctivitis. They will gently scrape a tiny area of the conjunctiva and test this tissue for those white blood cells.