How is the eye particularly itchy to return a responsibility

The eyes are particularly itchy, mainly caused by immune conjunctivitis, also known as allergic conjunctivitis, which is a hypersensitivity immune reaction of conjunctiva to external allergens. The conjunctiva is often exposed to allergens in the air, such as pollen, dust, animal feathers, etc., and is also susceptible to bacterial or other microbial infections. Immune conjunctivitis mediated by humoral immunity is immediate, and hay fever, atopic conjunctivitis, and vernal keratoconjunctivitis are more common. Cell-mediated conjunctivitis is a chronic process, often seen with vesicular conjunctivitis; a large number of eye drugs can cause iatrogenic conjunctival contact or allergic conjunctivitis, there are immediate and delayed type two; there is also a class of autoimmune diseases, including keratoconjunctivitis sicca, conjunctival pemphigoid and so on.