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inflammation of the lacrimal sac.
Dacryocystitis develops as a result of constriction of the lacrimonasal canal and inhibition of drainage of the lacrimal fluid from the lacrimal sac. The condition is chronic. It is manifested in tearing, suppurative discharge from the affected eye, and swelling of the tear sac; when pressure is applied to the area a mucous or pussy fluid is discharged. If the inflammation spreads beyond the tear sac phlegmon may develop, accompanied by severe edema and soreness in the inner corner of the palpebral fissure. Surgical operation (restoring drainage from the tear sac) is used to treat the condition.