2. chalazion chronic granulomatous inflammation of meibomian glands 【 pathogenesis】 obstruction of meibomian glands lipogranulomatous response to presence of lipids within eyelid tissues c clinical manifestation) Y Appears as erythematous nodules present on skin or conjunctival surface v Generally no pain and tenderness v lesions may become secondarily infected, it can develop into hordeolum9 2.chalazion  chronic granulomatous inflammation of meibomian glands obstruction of meibomian glands lipogranulomatous response to presence of lipids within eyelid tissues.  Appears as erythematous nodules present on skin or conjunctival surface  Generally no pain and tenderness  lesions may become secondarily infected , it can develop into hordeolum 【pathogenesis】 【clinical manifestation】