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Trabecular Meshwork Response to Pressure Elevation in the Living Human Eye
Published on: June 20, 2015
Schlemm's canal and trabecular meshwork morphology in high myopia
Zhiqi Chen1, Yinwei Song1, Mu Li1
1Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Summary
High myopia is associated with a larger Schlemm's canal and thinner trabecular meshwork. These morphologic changes in highly myopic eyes may explain the increased risk of open-angle glaucoma.
Area of Science:
- Ophthalmology
- Glaucoma Research
- Myopia Research
Background:
- High myopia is a known risk factor for open-angle glaucoma, but the underlying mechanisms remain unclear.
- Understanding the structural differences in the anterior segment of highly myopic eyes is crucial for glaucoma risk assessment.
Purpose of the Study:
- To investigate the morphologic alterations of Schlemm's canal and trabecular meshwork in highly myopic eyes.
- To explore potential correlations between these structural changes and refractive error, axial length, and intraocular pressure.
Main Methods:
- Optical coherence tomography (OCT) was used to image Schlemm's canal and trabecular meshwork in 40 highly myopic eyes and 40 control eyes.
- Morphometric analysis of Schlemm's canal diameter and area, and trabecular meshwork thickness was performed.
- Statistical analysis was conducted to compare measurements between groups and assess correlations.
Main Results:
- Highly myopic eyes exhibited significantly larger Schlemm's canal diameter and area compared to controls.
- Trabecular meshwork thickness was significantly reduced in highly myopic eyes.
- Schlemm's canal area showed a negative correlation with intraocular pressure, but no significant correlation with axial length or refractive error.
Conclusions:
- This study reveals distinct morphologic differences in Schlemm's canal and trabecular meshwork in high myopia.
- These findings provide insights into the increased risk of open-angle glaucoma associated with high myopia.
- OCT-based analysis of these structures may aid in characterizing the pathophysiology of glaucoma in myopic eyes.
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