Ocular allergies - the most common of which is conjunctivitis - are caused by exposure to a substance to which the body is particularly sensitive. This triggers a strong, sometimes disproportionate, defense mechanism to eliminate it.
An allergy can occur both in the eye and in its appendages with intense irritation, redness, swelling, tearing, itching, burning and blurred vision.
Furthermore, the reaction can be part of a more general context, associated with other disorders, such as nasal congestion or itching, sneezing, hives, cough and migraine.
