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Does blindness affect ocular vestibular evoked myogenic potentials?
Ali Bayram1, Mehmet Kalkan1, Nuri Ünsal1
1Department of ENT, Kayseri Training and Research Hospital, Kayseri, Turkey.
American Journal of Otolaryngology
|March 12, 2018
Summary
Blindness does not affect ocular vestibular evoked myogenic potentials (oVEMP) responses. These auditory evoked potentials can be reliably measured in blind eyes with preserved ocular structures.
Area of Science:
- Neuroscience
- Ophthalmology
- Audiology
Background:
- Ocular vestibular evoked myogenic potentials (oVEMP) assess the function of the otolith organs and the ocular motor pathways.
- Understanding how blindness impacts oVEMP responses is crucial for accurate clinical interpretation.
Purpose of the Study:
- To investigate the influence of unilateral blindness on oVEMP responses.
- To compare oVEMP parameters between blind and healthy eyes.
Main Methods:
- Thirty-one subjects with unilateral blindness and 25 healthy controls were recruited.
- oVEMP latency, amplitude, and amplitude asymmetry ratio (AR) were measured.
- Measurements were compared between the blind eye, contralateral eye, and control subjects.
Main Results:
- oVEMP recordings were successfully obtained in 93.5% of blind eyes.
- No significant differences were found in latency, amplitude, or AR between the blind eye, contralateral eye, and control subjects.
Conclusions:
- oVEMP responses are not significantly affected by unilateral blindness.
- Reliable oVEMP recordings can be elicited in blind eyes if the eyeball and extraocular muscles are intact.
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