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Abnormal supranuclear eye movements in the child: a practical guide to examination and interpretation
L Cassidy1, D Taylor, C Harris
1Department of Ophthalmology, Great Ormond Street Hospital for Children, London, United Kingdom.
Insights
Abnormal infant eye movements can signal serious neurologic conditions. Early detection and careful examination of the ocular motor system are crucial for accurate diagnosis and timely treatment in children.
Area of Science:
- Pediatric Neurology
- Ophthalmology
- Developmental Neuroscience
Background:
- Abnormal eye movements in children can be congenital or acquired, stemming from visual development issues or underlying neurologic/neuromuscular diseases.
- Distinguishing abnormal from immature eye movements is vital, as serious, treatable disorders can manifest in infancy.
- The presentation and spectrum of eye movement disorders differ significantly between pediatric and adult populations.
Purpose of the Study:
- To provide a practical guide for examining and interpreting pediatric eye movements.
- To highlight the importance of ocular motor system assessment in children at risk for neurologic disease.
- To review recent literature on childhood eye movement disorders, focusing on supranuclear abnormalities.
Main Methods:
- Systematic review of recent literature on pediatric eye movement disorders.
- Description of examination techniques for supranuclear ocular motor abnormalities.
- Structured approach to evaluating saccades, pursuit, convergence, vestibulo-ocular reflex, and optokinetic nystagmus.
Main Results:
- Eye movement analysis is a key diagnostic tool for identifying underlying conditions and classifying neurologic diseases in children.
- Abnormal eye movements in infants and children warrant thorough investigation, as they can indicate serious, treatable conditions.
- A structured examination of the ocular motor system aids in the detection and interpretation of various pediatric eye movement abnormalities.
Conclusions:
- Careful examination of the ocular motor system is essential for all children, especially those at risk for neurologic disease.
- Abnormal eye movements in children should not be dismissed as benign without comprehensive evaluation.
- This review offers a framework for understanding and assessing supranuclear eye movement disorders in childhood.
Abstract:
Abnormal eye movements in the infant or voting child can be congenital or acquired. They may be a result of abnormal early visual development or a sign of underlying neurologic or neuromuscular disease. It is important to be able to detect these abnormalities and to distinguish them from normal but immature eye movements. The spectrum of disease in children differs from that in adults. Serious, potentially fatal but treatable disorders can be acquired in infancy, and abnormal eye movements in a sometimes apparently well child should never be labeled as congenital or benign without careful investigation. Eye movement analysis can indicate the presence of an underlying condition and help the clinician to classify different neurologic diseases. It is important to carefully examine the ocular motor system in any children at risk of neurologic disease. This review provides a practical guide to the examination and interpretation of eye movements in the child and includes recent literature on eye movement disorders of childhood. We describe supranuclear abnormalities of the ocular motor system in the order in which we would normally examine it: saccades, pursuit, convergence, vestibulo-ocular reflex, and optokinetic nystagmus. Nystagmus, internuclear ophthalmoplegia, cranial nerve abnormalities, and "miswiring" phenomena (such as Duane's syndrome and synergistic divergence) are not discussed.
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