<prompt> Phlyctenular conjunctivitis false is-The most common cause is tuberculosisThe lesions are typically found near the limbusPredominantly affects childrenIs a type IV hypersensitivity reaction  <response>: Tuberculous proteins were considered, previously, as the most common cause. Staphylococcus proteins are now thought to account for most of the cases. Age. Peak age group is 3-15 years. Phlyctenular keratoconjunctivitis is believed to be a delayed hypersensitivity Type IV-cell mediated response to endogenous microbial proteins. ref: A K KHURANA OPHTALMOLOGY,E4, Page-77 