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Automated perimetry in primary open-angle glaucoma

Y F Chen1, T H Wang, P T Hung

  • 1Department of Ophthalmology, National Taiwan University Hospital, Taipei, ROC.

Journal of the Formosan Medical Association = Taiwan Yi Zhi
|June 1, 1997
PubMed
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Primary open-angle glaucoma (POAG) causes blindness, often detected late. This study identified visual field defects in POAG patients, noting paracentral and nasal areas are most affected, aiding early management.

Area of Science:

  • Ophthalmology
  • Neuroscience

Background:

  • Primary open-angle glaucoma (POAG) is a major global cause of irreversible blindness.
  • Patients often remain asymptomatic until significant visual field and anatomical damage occurs.
  • Early detection and management are crucial, particularly for moderate to advanced stages.

Purpose of the Study:

  • To investigate the characteristic patterns of automated visual field defects in patients with POAG.
  • To analyze the depth and frequency of visual field defects based on patient age and intraocular pressure (IOP).

Main Methods:

  • Retrospective analysis of 296 POAG patients from a single institution.
  • Visual field perimetry performed using Octopus (programs 32 or 38) or Humphrey (program 30-2).
  • Analysis of defect locations and depth, stratified by age and IOP, using Glaucoma Hemifield Test criteria.

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Main Results:

  • The most commonly affected areas in POAG visual fields were the paracentral regions.
  • The deepest visual field defects (scotomas) were observed in the upper and lower nasal areas.
  • Elevated IOP (>25 mmHg) or age (>50 years) correlated with greater mean sensitivity losses in both visual hemifields.

Conclusions:

  • Automated visual field defect patterns in POAG provide valuable insights for clinical management.
  • Understanding these patterns can aid in the timely diagnosis and treatment of POAG.
  • Age and IOP are significant factors influencing the severity of visual field loss in POAG.