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The definition and classification of glaucoma in prevalence surveys
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  1. Paul J Foster1,
  2. Ralf Buhrmann2,
  3. Harry A Quigley3,
  4. Gordon J Johnson1
  1. 1Department of Epidemiology and International Eye Health, Institute of Ophthalmology, Bath Street, London EC1V 9EL, UK
  2. 2University of Ottawa Eye Institute, Ottawa, Ontario, Canada
  3. 3Dana Center for Preventive Ophthalmology, Johns Hopkins University, Baltimore, Maryland, USA
  1. Correspondence to: Paul J Foster, Department of Epidemiology and International Eye Health, Institute of Ophthalmology, Bath Street, London EC1V 9EL, UK; p.foster{at}ucl.ac.uk

Abstract

This review describes a scheme for diagnosis of glaucoma in population based prevalence surveys. Cases are diagnosed on the grounds of both structural and functional evidence of glaucomatous optic neuropathy. The scheme also makes provision for diagnosing glaucoma in eyes with severe visual loss where formal field testing is impractical, and for blind eyes in which the optic disc cannot be seen because of media opacities.

  • glaucoma
  • prevalence surveys
  • PACG, primary angle closure glaucoma
  • POAG, primary open angle glaucoma
  • VCDR, vertical cup:disc ratio
  • IOP, intraocular pressure
  • PAC, primary angle closure
  • PAS, peripheral anterior synechiae
  • glaucoma
  • prevalence surveys
  • PACG, primary angle closure glaucoma
  • POAG, primary open angle glaucoma
  • VCDR, vertical cup:disc ratio
  • IOP, intraocular pressure
  • PAC, primary angle closure
  • PAS, peripheral anterior synechiae
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