Epiphora

Abnormal overflow of tears onto the eyelid margin and face, distinct from physiological lacrimation associated with emotional crying, caused by impaired tear drainage or excessive tear production.

Causes

• Tear drainage disorders

  • Nasolacrimal duct obstruction

  • Ectropion

  • Entropion

  • Facial nerve palsy affecting eyelid closure and tear drainage

• Environmental and irritant causes

  • Dust exposure

  • Smoke exposure

  • Environmental irritants

  • Foreign objects in the eye

• Allergic and inflammatory eye disorders

  • Allergic reactions

  • Blepharitis

  • Conjunctivitis

  • Dry eye syndrome with reflex tearing

• Trauma and medical treatments

  • Ocular trauma

  • Chemotherapy-related ocular irritation