Eye Allergy

Eye allergies are mainly related to the conjunctiva. It is a tissue lining that mainly covers the eyeball, it is rich in blood vessels. The conjunctiva is a thin membrane that keeps the front surface of the eye as well as the eyelids lubricated. It also protects the eye from harmful particles and pathogens.

Eye allergies are also termed as allergic conjunctivitis. Allergic conjunctivitis occurs when the eye comes in contact with an allergen. An allergen is defined as a substance that can irritate the eye. To counter the allergen, the eye produces a certain chemical called histamine. As a result, the eyelids and conjunctiva become watery, swollen, and red. It also results in a burning sensation in the eye and the person may feel like constantly itching their eyes.