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Improving detection of blindness in childhood: the British Childhood Vision Impairment study
Jugnoo S Rahi1, Phillippa M Cumberland, Catherine S Peckham
1University College London, Institute of Child Health, MRC Centre of Epidemiology for Child Health, 30 Guilford St, London WC1N 1EH, UK. j.rahi@ich.ucl.ac.uk
Insights
Early detection of severe visual impairment or blindness (SVI/BL) in children is crucial. Many cases are missed by routine screening, highlighting the need for improved parental awareness and enhanced clinical surveillance programs.
Area of Science:
- Ophthalmology
- Pediatrics
- Public Health
Background:
- Established childhood vision screening programs exist in industrialized nations, but their performance is not well understood.
- Investigating the presentation, detection, and early treatment of severe visual impairment or blindness (SVI/BL) in children is essential for improving outcomes.
Purpose of the Study:
- To analyze the patterns of presentation, detection, and early management of a nationally representative cohort of children with SVI/BL in the UK.
- To evaluate the effectiveness of current screening and surveillance methods for childhood visual impairment.
Main Methods:
- Active surveillance of children under 16 with new SVI/BL diagnoses in the UK during 2000.
- Data collection included sociodemographics, detection methods, co-occurring disorders, ophthalmic findings, and early management.
Main Results:
- 65% of 439 children were diagnosed before age 1; 28% were non-white; 40% from the most deprived areas.
- 77% had associated non-ophthalmic disorders. Parents suspected blindness in 47%, while health professionals noted signs in 70%.
- Routine screening detected 25% of isolated SVI/BL; clinical surveillance diagnosed 46% of SVI/BL with co-occurring conditions.
Conclusions:
- The patient journey for visually impaired children is significantly impacted by additional health issues.
- Enhanced parental education on visual development and evidence-based clinical surveillance programs are needed for at-risk children.
Objectives:
In industrialized countries, there are established programs of childhood vision screening and surveillance, but little is known about their performance. We investigated the patterns of presentation/detection and early treatment of a nationally representative cohort of children with severe visual impairment or blindness (SVI/BL) in 1 year (2000) in the United Kingdom.
Methods:
All children who were younger than 16 years and had a new diagnosis of SVI/BL were identified by active surveillance through the British Ophthalmological and Pediatric Surveillance Units. Data that were collected up to 1 year after diagnosis included sociodemographic characteristics, detection of SVI/BL, nonophthalmic disorders/impairments, ophthalmic findings, and early management.
Results:
Of 439 identified children, 65% were younger than 1 year at diagnosis, 28% were of nonwhite ethnicity, and 40% in the worst quintile of deprivation score. A total of 77% had associated nonophthalmic disorders/impairments. Although 70% had established symptoms or signs at diagnosis by a health professional, parents had suspected blindness in only 47%. A quarter of isolated SVI/BL was detected through routine vision screening; however, 46% of children's SVI/BL and associated nonophthalmic disorders/impairments were diagnosed through a clinical surveillance examination undertaken because of high risk for a specific eye disease.
Conclusions:
The "patient journey" of children with visual impairment is markedly influenced by the presence of additional impairments/chronic diseases. Parents' understanding of normal visual development needs to be improved. Increasingly, new evidence-based formal programs of clinical (ophthalmic) surveillance are needed in response to the changing population of children who are at risk for blinding eye disease.
