AION (Anterior Ischemic Optic Neuropathy)

Statistics and Associations

  • Two forms: arteritic (emergency) and non-arteritic
  • Non-arteritic associated with high blood pressure (40%) and diabetes (20%)
  • Occurs in people older than 55 (older than 60 for arteritic)
  • Fellow eye involved in 25%-40% (non-arteritic)
  • Vision loss usually permanent


  • Visual Field testing
  • Consider STAT lab testing (ESR, CRP, CBC), check blood pressure
  • Consider daily aspirin for non-arteritic AION