What is "ligneous conjunctivitis"

n. (context medicine English) A rare condition characterized by chronic, recurrent conjunctivitis associated with a pseudomembrane, and it may involve other mucous membranes in the mouth, nasopharynx, trachea, and vagina.

Ligneous conjunctivitis is a rare form of chronic conjunctivitis characterized by recurrent, fibrin-rich pseudomembranous lesions of wood-like consistency that develop mainly on the underside of the eyelid ( tarsal conjunctiva). It is generally a systemic disease which may involve the periodontal tissue, the upper and lower respiratory tract, kidneys, middle ear, and female genitalia. It can be sight-threatening, and death can occasionally occur from pulmonary involvement.