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Pattern Strabismus: Where Does the Brain's Role End and the Muscle's Begin?
Fatema F Ghasia1, Aasef G Shaikh
1Cole Eye Institute, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
Journal of Ophthalmology
|July 19, 2013
Summary
Pattern strabismus, a common form of infantile strabismus, may stem from oblique muscle issues or altered neural connections. Understanding these causes is key for effective surgical treatment.
Area of Science:
- Ophthalmology
- Neuroscience
- Genetics
Background:
- Vertically incomitant pattern strabismus accounts for 50% of infantile horizontal strabismus.
- Oblique muscle dysfunction is frequently linked to pattern strabismus.
- Recent research in non-human primate models has illuminated the mechanisms underlying pattern strabismus.
Purpose of the Study:
- To review the current understanding of the etiologies of pattern strabismus.
- To explore the speculated pathophysiology of pattern strabismus.
- To emphasize the importance of understanding pattern strabismus mechanisms for surgical treatment planning.
Main Methods:
- Review of existing literature on pattern strabismus.
- Analysis of high-resolution orbit imaging studies.
- Examination of contemporary neurophysiology studies in non-human primate models.
Main Results:
- Speculated pathophysiology includes oblique muscle dysfunction, loss of fusion, altered recti muscle function, pulley system instability, vestibular hypofunction, and abnormal neural connections.
- Orbital mechanical factors like abnormal pulleys are implicated in craniofacial anomalies, connective tissue disorders, and late-onset strabismus.
- Abnormal neural connections may drive infantile-onset pattern strabismus.
Conclusions:
- Pattern strabismus is likely multifactorial, with distinct potential causes for infantile versus late-onset presentations.
- Orbital mechanical factors and abnormal neural connections represent key areas of investigation.
- A comprehensive understanding of pattern strabismus mechanisms is crucial for optimizing surgical interventions.
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