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Ocular saccades in Duane's syndrome
The British Journal of Ophthalmology
|August 1, 1978
Summary
Hering's law is affected in Duane's syndrome patients. The sound eye's movement is impacted, and Hering's law only holds when the affected eye can adduct.
Area of Science:
- Ophthalmology
- Neuroscience
- Physiology
Background:
- Duane's syndrome involves abnormal eye movements due to nerve issues.
- Hering's law describes equal innervation to yoke muscles during conjugate gaze.
Purpose of the Study:
- To investigate the impact of paradoxical innervation in Duane's syndrome on Hering's law.
- To analyze eye motility in patients with Duane's syndrome.
Main Methods:
- Studied 10 patients diagnosed with Duane's syndrome.
- Measured eye movements using binocular electro-oculography.
Main Results:
- The motility of the sound (unaffected) eye was demonstrably affected.
- Hering's law was observed to hold when adduction of the affected eye was possible.
- Hering's law could not be demonstrated when adduction of the affected eye was limited.
Conclusions:
- Paradoxical innervation in Duane's syndrome alters the expected function of Hering's law.
- The ability of the affected eye to adduct is crucial for Hering's law to be maintained in this condition.