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Visual impairment in children in middle- and lower-income countries
Paul Courtright1, Amy K Hutchinson, Susan Lewallen
1Kilimanjaro Centre for Community Ophthalmology, Good Samaritan Foundation, PO Box 2254, Moshi, Tanzania. pcourtright@kcco.net
Insights
Childhood blindness remains a significant global health issue, impacting children
Area of Science:
- Global Public Health
- Ophthalmology
- Pediatrics
Background:
- Childhood visual impairment and blindness have lifelong consequences, necessitating global prevention efforts like VISION 2020.
- While vitamin A deficiency and measles blindness have decreased, new challenges like retinopathy of prematurity, childhood cataract, pediatric glaucoma, and refractive errors are emerging.
- The global burden of childhood blindness requires updated assessments of magnitude and causes due to significant changes over the past decades.
Purpose of the Study:
- To reassess the current magnitude and causes of childhood blindness and visual impairment globally.
- To highlight the evolving landscape of childhood visual impairment, including the rise of retinopathy of prematurity and other treatable conditions.
- To advocate for programmatic approaches and multidisciplinary teams to effectively reduce childhood blindness.
Main Methods:
- Review of global data and trends in childhood blindness.
- Analysis of the impact of public health interventions (e.g., vitamin A supplementation, measles immunization).
- Identification of emerging causes and challenges in pediatric ophthalmology.
Main Results:
- Significant reduction in vitamin A deficiency-related blindness in many regions.
- Increasing prevalence of retinopathy of prematurity, particularly in industrializing nations.
- Growing recognition of childhood cataract, pediatric glaucoma, and refractive errors as significant avoidable causes.
Conclusions:
- A programmatic, multidisciplinary approach is crucial for reducing childhood blindness.
- Continued efforts and updated strategies are needed to address the changing patterns of childhood visual impairment.
- Increasing the number of trained pediatric ophthalmologists in resource-poor settings is essential.
Abstract:
Reducing visual impairment and blindness in children in resource-poor countries is one of the key components of the major global prevention of blindness initiative, VISION 2020 the Right to Sight. Although visual impairment and blindness among children is much less common than among adults, the potential lifespan of a child means that the lifelong impact of such impairment is very large. Over 10 years ago, it was estimated that, globally, 1.4 million children were blind. Much has changed in the past 10-20 years and there is a need to reassess both the magnitude and causes of global childhood blindness and visual impairment. While the widespread implementation of vitamin A supplementation and measles immunisation programmes have led to a reduction in vitamin A deficiency-related blindness in many poor countries, retinopathy of prematurity is now undergoing a third wave of endemicity, particularly in newly industrialising countries in Latin America and Asia. Childhood cataract is better recognised as an important potentially avoidable problem, as is paediatric glaucoma and refractive error in some populations. Trained paediatric ophthalmologists, although still too few, are growing in number in poor countries. A programmatic approach with a multidisciplinary team is essential to reducing childhood blindness. The elements of such programmes and the need for planning are discussed.
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