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Screening for glaucoma. Why is the disease underdetected?
Drugs & Aging
|January 1, 1997
Summary
Glaucoma often goes undetected, with at least 50% of cases missed in population surveys. This underdetection is particularly pronounced in normal-pressure glaucoma, highlighting a critical public health issue in eye care.
Area of Science:
- Ophthalmology
- Public Health
- Epidemiology
Background:
- Glaucoma is a leading cause of irreversible blindness worldwide.
- A significant proportion of glaucoma cases remain undiagnosed in the general population.
- Understanding underdetection is crucial for improving glaucoma screening and management.
Purpose of the Study:
- To review population-based glaucoma prevalence surveys to estimate the rate of underdetection.
- To investigate reasons for glaucoma underdetection in England and Wales.
- To identify specific glaucoma subtypes with higher rates of underdetection.
Main Methods:
- Systematic review of 15 population-based glaucoma prevalence surveys from diverse geographical regions.
- Analysis of glaucoma detection pathways in England and Wales, focusing on primary eye examinations and referral criteria.
- Comparison of detection rates across different glaucoma types.
Main Results:
- At least 50% of individuals with glaucoma were previously undetected in reviewed surveys.
- High attendance for sight tests in those over 40, but variable quality of primary glaucoma testing.
- Referral criteria for hospital eye clinics exclude many patients, contributing to underdetection.
- Underdetection is most significant in normal-pressure glaucoma cases.
Conclusions:
- Glaucoma underdetection is a widespread issue, affecting at least half of all patients.
- Inconsistent primary eye care testing standards and restrictive referral pathways exacerbate underdetection.
- Normal-pressure glaucoma represents a particular challenge for early detection and timely intervention.
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