Conjunctiva is a thin outer most layer of an eye which consists, inner part of both upper and lower eyelids. Allergic Conjunctivitis is the hypersensitivity reaction of this layer due to substances such as pollens, grass, animal fur (dandruff), house dust mite etc. It may also involve cornea. It commonly affects children and young adults between 4 – 20 years old although people of all ages can be affected. It may be associated with hay fever (allergic rhinitis).