Conjunctivitis is the inflammation of the transparent membrane that covers the white part of the eye and lines the inner surfaces of the eyelids.
Allergic conjunctivitis is a type of conjunctivitis caused by an allergic response to allergens such as pollens, danders, dusts, and smoke. The major symptom of allergic conjunctivitis is itching, but sometimes it may be accompanied by threadlike or ropy discharges mostly made up of epithelial cells and debris.