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Light-gazing by visually impaired children
J E Jan1, M Groenveld, A M Sykanda
1Division of Child Neurology, University of British Columbia, Canada.
Insights
Light-gazing, a compulsive behavior, is common in children with cortical visual impairment (CVI). This sign suggests central nervous system involvement in visually impaired children, even with eye lesions.
Area of Science:
- Ophthalmology
- Pediatrics
- Neurology
Background:
- Cortical visual impairment (CVI) is a leading cause of childhood visual impairment.
- Light-gazing is a recognized clinical sign associated with CVI.
- Understanding the prevalence and characteristics of light-gazing can aid in diagnosing CNS involvement.
Purpose of the Study:
- To assess the prevalence and characteristics of light-gazing in visually impaired children.
- To explore the association between light-gazing and central nervous system (CNS) involvement.
- To determine the clinical significance of light-gazing and related behaviors in pediatric visual impairment.
Main Methods:
- Retrospective analysis of visually impaired children referred over a 2.5-year period.
- Assessment of clinical signs, including light-gazing and finger-flicking.
- Correlation of observed behaviors with diagnosis of CVI and other ocular or neurological conditions.
Main Results:
- Light-gazing occurred in 60% of children diagnosed with CVI.
- Finger-flicking in front of a light source was identified as an extension of compulsive light-gazing behavior.
- The study suggests light-gazing in children with ocular lesions indicates CNS involvement.
Conclusions:
- Light-gazing is a prevalent sign in children with CVI.
- The presence of light-gazing, even with ocular lesions, suggests underlying CNS abnormalities.
- Stereotyped behaviors like light-gazing and finger-flicking may serve as valuable clinical indicators of neuropathological conditions in visually impaired children.
Abstract:
This study assessed the prevalence and characteristics of light-gazing by all visually impaired children referred during a 2 1/2-year period. Light-gazing (compulsive staring into lights) is one of the many clinical signs of cortical visual impairment (CVI), and in the present study it occurred in 60 per cent of children with CVI. The authors believe that light-gazing by any child with ocular lesions indicates some degree of CNS involvement. Visually impaired children who flicker their fingers in front of their eyes against a light source demonstrate an extension of this compulsive behaviour. This and other studies suggest that blind mannerisms have specific neuropathological substrata and therefore are useful clinical signs.