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Comparison of Corvis ST Parameters between Primary Open-Angle Glaucoma and Primary Angle-Closure Glaucoma
Yuta Nakaniida1, Kana Tokumo1, Hiromitsu Onoe1
1Department of Ophthalmology and Visual Science, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
Journal of Clinical Medicine
|August 12, 2023
Summary
Corneal biomechanics differ between primary open-angle glaucoma (POAG) and primary angle-closure glaucoma (PACG). Axial length variations may explain some differences in corneal visualization Scheimpflug technology (CST) parameters.
Area of Science:
- Ophthalmology
- Biomechanical engineering
Background:
- Glaucoma encompasses various conditions affecting optic nerve health.
- Primary open-angle glaucoma (POAG) and primary angle-closure glaucoma (PACG) represent distinct glaucoma subtypes.
- Corneal biomechanical properties may influence glaucoma development and progression.
Purpose of the Study:
- To compare corneal visualization Scheimpflug technology (CST) parameters between eyes with POAG and PACG.
- To investigate the relationship between axial length (AL) and CST parameters in these glaucoma groups.
Main Methods:
- Retrospective analysis of CST data from 89 eyes with POAG and 83 eyes with PACG.
- Comparison of CST parameters using a linear mixed model (LMM).
Main Results:
- No significant differences in age, central corneal thickness, intraocular pressure, or glaucoma medication use.
- PACG eyes exhibited shorter axial length (AL), longer applanation 2 (A2) time, deeper A2 deformation amplitude, shorter peak distance, and longer whole eye movement compared to POAG eyes.
- Axial length showed varying correlations with specific CST parameters, including highest concavity (HC) length and peak distance (PD).
Conclusions:
- Corneal biomechanical properties significantly differ between POAG and PACG.
- Differences in axial length may contribute to the observed variations in CST parameters between the two glaucoma types.
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