text: Common causes of<unk>  include bacteria, viruses, and environmental factors.
  Viral<unk>  is the most common cause of infectious<unk>  both overall and in the adult population. Bacterial<unk>  is the second most common cause and is responsible for the majority of cases in children. Allergic<unk>  is the most frequent cause, affecting 15% to 40% of the population.
  Noninfectious<unk>  includes keratoconjunctivitis sicca (dry eye syndrome) and superior limbic keratoconjunctivitis may cause by inflammation secondary to immune-mediated diseases or mechanical irritation.
option_0: Conjunctivitis causes
option_1: Rhinitis causes
option_2: Eye injury causes
option_3: Cough causes
option_4: Anaphylaxis causes
option_5: Rhinosinusitis causes
option_6: Vulvitis causes
option_7: Vertigo causes