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Glaucoma screening in a high-risk population.

Setareh Vistamehr1, Heather N Shelsta, Philip C Palmisano

  • 1Department of Ophthalmology and Visual Science, Yale University School of Medicine, New Haven, CT 06520, USA.

Journal of Glaucoma
|November 16, 2006
PubMed
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A screening protocol using intraocular pressure (IOP) and family history effectively identifies individuals at higher risk for chronic open angle glaucoma. This aids in determining who needs a comprehensive glaucoma evaluation.

Area of Science:

  • Ophthalmology
  • Public Health
  • Medical Screening

Background:

  • Chronic open-angle glaucoma (COAG) is a leading cause of irreversible blindness.
  • Early detection and intervention are crucial for managing glaucoma progression.
  • Effective screening protocols are needed to identify at-risk populations for timely evaluation.

Purpose of the Study:

  • To evaluate a screening protocol for detecting individuals at higher risk of COAG.
  • To determine the efficacy of a screening protocol in identifying candidates for a full glaucoma evaluation.

Main Methods:

  • A screening phase involved questionnaires and measurements of visual acuity, intraocular pressure (IOP), and visual fields using Frequency Doubling Technology in African Americans over 40.
  • Participants were categorized as 'glaucoma likely' or 'unlikely' based on screening results.

Related Experiment Videos

  • A comprehensive glaucoma examination, including applanation tonometry, pachymetry, visual fields, gonioscopy, and fundoscopy, was used for final classification.

    • Main Results:

    • 81.7% sensitivity and 55% specificity were achieved in identifying 'glaucoma likely' individuals.
    • Family history of glaucoma in first-degree relatives and screening IOP > 21 mm Hg were significant predictors of 'glaucoma likely' status.
    • 82% of patients classified as 'glaucoma likely' in the final exam were correctly identified during the screening phase.

    Conclusions:

    • The combination of elevated IOP (> 21 mm Hg) and a family history of glaucoma effectively identifies individuals at increased risk for COAG.
    • This screening approach can help prioritize individuals for a complete glaucoma examination, facilitating early diagnosis and management.
    • The findings support the use of this protocol in targeted screening programs for glaucoma detection.