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The ciliary ganglion and vitreous cavity shape
T Lin1, X Zhu, C Capehart
1Department of Ophthalmology, University of Pennsylvania, School of Medicine, Scheie Eye Institute, Philadelphia 19104, USA.
Current Eye Research
|May 1, 1996
Summary
The ciliary ganglion inhibits eye growth, primarily affecting equatorial dimensions. Disrupting this ganglion leads to excessive eye enlargement, particularly in chicks, with minimal impact on experimental myopia.
Area of Science:
- Ophthalmology
- Neuroscience
- Developmental Biology
Background:
- The ciliary ganglion plays a role in ocular development and function.
- Understanding its influence on eye growth is crucial for addressing visual impairments.
Purpose of the Study:
- To investigate the ciliary ganglion's impact on postnatal eye growth.
- To determine its effect on eyes with normal vision and those under altered visual conditions.
Main Methods:
- Newborn chicks underwent ciliary ganglionectomy or sham surgery.
- Eyes were studied with and without an image-diffusing goggle, measuring refraction, dimensions, and histology.
Main Results:
- Ciliary ganglionectomy caused excessive equatorial eye growth in chicks.
- A modest increase in axial growth and relative hyperopia were observed.
- Lens thinning and increased choroid thickness were associated findings.
Conclusions:
- The ciliary ganglion inhibits postnatal eye growth, mainly in equatorial dimensions.
- Its influence on experimental myopia is minimal, suggesting other regulatory factors.
- Parasympathetic input disruption affects ciliary muscle and eye morphology.