Phlyctenulosis is grouped under Phlyctenular Keratoconjunctivitis phlyctenule conjunctivitis. We have conjunctival or corneal phylectenes, it is an inflammatory syndrome caused by delayed type 4 hypersensitivity to one or more antigens. The triggering antigen is a bacterial protein in particular from Staphylococcus aureus may be virus-fungus candida or nematode.

Primary complex may also play a part hypersensitivity to tubercular proteins  symptoms are Irritation Discomfort of pain F body irritation Blepharospasm Photophobia MP conjunctivitis In cases of corneal phylectene,   pain and photophobia are more one may get corneal scarring in  these patients    phlyctenular conjunctivitis is an anterior segment manifestation of sarcoidosis and also cause of corneal vascularisation   treatment with low strength steroids. Share your views.