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Bell's palsy and intraocular pressure.
Annals of Ophthalmology
|August 1, 1975
Summary
Nerve blocks targeting the 7th cranial nerve did not alter intraocular pressure in patients. This study found no significant effect of orbicularis muscle tone on eye pressure measurements.
Area of Science:
- Ophthalmology
- Neuroscience
- Physiology
Background:
- Orbicularis muscle tone can influence intraocular pressure (IOP).
- The 7th cranial nerve (facial nerve) innervates the orbicularis oculi muscle.
Purpose of the Study:
- To investigate the impact of modulating orbicularis oculi muscle tone on IOP.
- To determine if blocking the 7th cranial nerve affects IOP measurements.
Main Methods:
- A prospective study design was employed.
- Local nerve blocks of the 7th cranial nerve were administered using Van Lint or O'Brien and Atkinson techniques.
- Intraocular pressure was measured after nerve block application.
Main Results:
- No statistically significant changes in intraocular pressure were observed after 7th cranial nerve blockade.
- Both Van Lint and O'Brien and Atkinson methods yielded similar results regarding IOP.
Conclusions:
- Modulating orbicularis oculi muscle tone via 7th cranial nerve blockade does not appear to affect intraocular pressure.
- These findings suggest that orbicularis tone may not be a significant determinant of IOP in the absence of other factors.