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Refractive Error Study in Children: sampling and measurement methods for a multi-country survey
A D Negrel1, E Maul, G P Pokharel
1Programme for the Prevention of Blindness and Deafness, World Health Organization, Geneva, Switzerland.
American Journal of Ophthalmology
|April 15, 2000
Summary
This study assessed refractive error and vision impairment prevalence in children across diverse ethnic and cultural groups. Standardized methods allow for accurate comparisons of findings in pediatric populations.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Public Health
Background:
- Refractive error and vision impairment are significant global health concerns in children.
- Understanding prevalence across diverse populations is crucial for targeted interventions.
Purpose of the Study:
- To determine the prevalence of refractive error and vision impairment in children.
- To compare findings across different ethnic origins and cultural settings.
Main Methods:
- Population-based cross-sectional samples of children aged 5–15 years.
- Cluster sampling methodology employed for sample selection.
- Key outcome measures included visual acuity and refractive error under cycloplegia.
Main Results:
- Detailed descriptions of study design, sample size calculations, and enumeration methods.
- Ophthalmic examination procedures and quality assurance monitoring outlined.
- Data analysis and statistical methodologies are presented.
Conclusions:
- The study design and measurement methods ensure accurate estimation of refractive error prevalence.
- Standardized methodology facilitates reliable comparisons between diverse populations.
- Findings contribute to understanding age- and sex-specific refractive error patterns.