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PACS vs PAC vs PACG

Primary Angle Closure — Classification

Classification Comparison

PACS PAC PACG
ITC ≥180° ✔ ✔ ✔
Elevated IOP ✘ ✔ ✔
PAS ✘ ✔ ✔
Nerve Damage ✘ ✘ ✔
VF Defect ✘ ✘ ✔
Key Concept:
  • ► PACS = Primary Angle Closure Suspect
    narrow angle (anatomy)
  • ► PAC = Primary Angle Closure
    pressure problem (function)
  • ► PACG = Primary Angle Closure Glaucoma
    nerve damage (disease)

Note: In PAC and PACG, elevated IOP and PAS can occur independently or together.

anatomical risk  ►  functional problem  ►  structural damage

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