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Prevalence of visual impairment in children: a review of available data
C E Gilbert1, L Anderton, L Dandona
1Department of Preventive Ophthalmology, Institute of Ophthalmology, London, U.K. clare.gilbert@ucl.ac.uk
Insights
Childhood blindness and severe visual impairment data are crucial for effective service planning. Prevalence varies significantly, with poorer nations experiencing a ten-fold higher rate than wealthier ones.
Area of Science:
- Ophthalmology
- Public Health
- Epidemiology
Background:
- Data on childhood blindness and severe visual impairment are essential for planning services.
- Existing data sources have limitations, impacting accurate prevalence estimation.
- Understanding the scope of the problem is vital for resource allocation and intervention strategies.
Purpose of the Study:
- To review available data on the prevalence, magnitude, and causes of blindness and severe visual impairment in children.
- To discuss epidemiological methods used in studying childhood visual impairment.
- To highlight disparities in prevalence between different socioeconomic regions.
Main Methods:
- Review of existing epidemiological studies and data sources on childhood visual impairment.
- Analysis of prevalence data across different countries and economic strata.
- Discussion of methodological challenges in collecting accurate data.
Main Results:
- Significant disparities in prevalence exist, with rates up to ten times higher in the poorest countries compared to the wealthiest.
- Estimated prevalence ranges from 0.1/1000 children (aged 0-15) in wealthy nations to 1.1/1000 in poorer nations.
- The review highlights the need for improved data collection and standardization.
Conclusions:
- There is a substantial global burden of childhood blindness and severe visual impairment, particularly in low-income countries.
- Accurate epidemiological data are fundamental for developing targeted interventions and improving child eye health services.
- Further research is needed to refine prevalence estimates and identify specific causes in diverse populations.
Abstract:
Data on the prevalence, magnitude and causes of blindness and severe visual impairment in children are needed for planning and evaluating preventive and curative services for children, and for planning special education and low vision services. Prevalence data can be obtained from a variety of different sources, each of which has limitations. The available data suggest that there may be a ten-fold difference in prevalence between the wealthiest countries of the world and the poorest, ranging from as low as 0.1/1000 children aged 0-15 years in the wealthiest countries to 1.1/1000 children in the poorest. In this paper, the available data are reviewed and the epidemiological methods and findings are discussed.