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Updated: Jul 18, 2026
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Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
Ocular haemodynamics in pseudoexfoliative and primary open-angle glaucoma
1Instituto Gallego de Oftalmología, La Coruña, Spain. tontxu_1999@yahoo.com
Eye (London, England)
|December 19, 2006
Summary
Primary open-angle glaucoma (POAG) patients exhibit reduced retrobulbar blood flow (PSV, EDV) and increased resistance (RI) in the ophthalmic artery and ciliary arteries compared to pseudoexfoliative glaucoma (PXE) patients.
Area of Science:
- Ophthalmology
- Glaucoma Research
- Ocular Hemodynamics
Background:
- Pseudoexfoliative glaucoma (PXE) and primary open-angle glaucoma (POAG) are leading causes of irreversible blindness.
- Understanding retrobulbar hemodynamics may offer insights into glaucoma pathophysiology.
Purpose of the Study:
- To compare retrobulbar hemodynamic parameters in the ophthalmic artery (OA) and short posterior ciliary arteries (SPCA).
- To differentiate hemodynamic profiles between PXE and POAG patients.
Main Methods:
- A prospective cross-sectional study included 43 eyes with PXE and 31 eyes with POAG.
- Colour Doppler imaging assessed peak systolic velocity (PSV), end-diastolic velocity (EDV), and Pourcelot resistivity index (RI) in the OA and PCA.
- Visual function was evaluated using the 24-2 Swedish Interactive Threshold Algorithm (SITA).
Main Results:
- POAG patients showed significantly lower PSV and EDV in both OA and PCA compared to PXE patients (P<0.003).
- The RI was significantly higher in both OA and PCA in the POAG group (P<0.001).
Conclusions:
- POAG is associated with reduced blood flow and increased vascular resistance in retrobulbar vessels.
- These hemodynamic differences may contribute to understanding the distinct pathologies of POAG and PXE.
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