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Related Experiment Videos

Classification of primary angle closure disease.

Ramanjit Sihota1

  • 1Glaucoma Research Facility and Clinical Services, Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India. rjsihota@hotmail.com

Current Opinion in Ophthalmology
|January 22, 2011
PubMed
Summary
This summary is machine-generated.

A new staging system for primary angle closure disease (PACD) is proposed, classifying patients based on anatomical changes and intraocular pressure (IOP) progression. This system aims to standardize treatment and prognosis for PACD.

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Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Ocular Anatomy

Background:

  • Primary angle closure disease (PACD) lacks a universally accepted clinical classification.
  • Existing classifications, like the ISGEO, are useful for surveys but not for clinical application due to PACD's varied presentation.

Purpose of the Study:

  • To review the progression landmarks of PACD.
  • To propose a new, clinically applicable staging system for PACD.

Main Methods:

  • Literature review to identify key progression factors in PACD.
  • Development of a staging system based on anatomical predisposition, iridocorneal apposition, intraocular pressure (IOP) post-iridotomy, and optic neuropathy.

Main Results:

  • Key progression landmarks identified: anatomical predisposition, iridocorneal apposition/adhesions, chronic IOP rise despite iridotomy, and glaucomatous optic neuropathy.
  • Proposed staging: PACD suspect (occludable angle), PACD I (closure, normal IOP post-iridotomy), PACD II (synechiae, chronic raised IOP post-iridotomy, possible optic nerve head changes), PACD III (synechiae, raised IOP post-iridotomy, glaucomatous optic neuropathy).

Conclusions:

  • The proposed PACD staging system integrates various clinical subtypes (subacute, acute, chronic, symptomatic, asymptomatic).
  • Staging is based on the extent of damage to outflow channels and optic nerve head.
  • This classification provides a foundation for standardized therapy and quantifiable long-term prognosis in PACD.