Illacrimation or epiphora may be due to hypersecretion from the lacrimalgland. However, it is more often caused by obstructed drainage through the lower lacrimal system.
❖ Emotional distress (crying).
❖ Increased irritation of the eyes (by smoke, dust, foreign bodies, injury, orintraocular inflammation) leads to excessive lacrimation in the context of the defensive triad of blepharospasm, photosensitivity, and epiphora.
❖ Stricture or stenosis in the lower lacrimal system.
❖ Eyelid deformity (eversion of the punctum lacrimale, ectropion, or entropion).