Primary Angle Closure

0.1% of over 40s

1.5% of Chinese population over 50

Risk factors

• Demographic

  • Age >40
  • Female
  • Ethnicity: chinese, south east asian

• Anatomical

  • Narrow angle/shallow AC
    • Anterior iris-lens diaphragm
    • Large lens/cataract
    • Small corneal diameter
    • Short axial length (hypermetropic)
    • Lens thickness-to-axial length…