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Relation between neurological status, refractive error, and visual acuity in children: a clinical study
R T Mackie1, D L McCulloch, K J Saunders
1Department of Vision Sciences, Glasgow Caledonian University, UK.
Insights
Neurologically impaired children show different refractive error patterns and visual acuity compared to normal children. Visual status is linked to physical and intellectual impairment levels.
Area of Science:
- Ophthalmology
- Pediatric Neurology
- Developmental Pediatrics
Background:
- Neurological impairment can affect visual development and function.
- Understanding visual status in these children is crucial for intervention.
Purpose of the Study:
- To assess refractive status and visual acuity in neurologically impaired children.
- To explore the relationship between visual and neurological conditions in this population.
Main Methods:
- Non-cycloplegic retinoscopy for refractive error.
- Acuity cards and visual evoked potentials (VEP) for visual acuity.
- Analysis of 75 children aged 5 to 192 months.
Main Results:
- Refractive error distribution differed significantly from neurologically normal children.
- Higher prevalence of refractive anomalies in children over 5 years old.
- Visual acuity varied widely (logMAR: 0.07-2.08 with cards, 0.78-2.68 with VEP).
Conclusions:
- Neurologically impaired children exhibit distinct refractive development.
- Visual acuity and refractive status correlate with physical impairment.
- Intellectual impairment shows a weak association with visual status.
Abstract:
The aims of the present study were: (1) to determine the refractive status and visual acuity of a group of 75 neurologically impaired children (5 to 192 months of age); and (2) to investigate the relation between the visual and neurological status of these children. Refractive error was determined using non-cycloplegic near retinoscopy and visual acuity was estimated using acuity cards (Keeler or Cardiff) and pattern-onset visual evoked potentials (VEP). Subjects demonstrated a markedly different distribution of refractive error from that of a neurologically normal age-matched population. Refractive error anomalies were more prevalent in children older than 5 years, suggesting abnormal refractive development. A wide range of visual acuity was found with both tests (acuity cards, 0.07 to 2.08 logMAR; VEP, O.78 to 2.68 logMAR). Visual acuity and refractive status varied with level and type of physical impairment. Level of intellectual impairment exhibited a weak relation with visual status.