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Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
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Structure-function correlation of localized visual field defects and macular microvascular damage in primary
Aizhu Tao1, Yuanbo Liang1, Juanjuan Chen1
1The Affiliated Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
Microvascular Research
|April 3, 2020
Summary
Primary open-angle glaucoma (POAG) is linked to reduced macular microvascular density. A moderate correlation exists between visual field sensitivity and this vascular damage, aiding in understanding POAG progression.
Area of Science:
- Ophthalmology
- Medical Imaging
- Glaucoma Research
Background:
- Primary open-angle glaucoma (POAG) is a leading cause of irreversible blindness.
- Macular microvasculature plays a crucial role in retinal health.
- Understanding the relationship between structural vascular changes and functional vision loss in POAG is essential.
Purpose of the Study:
- To investigate regional alterations in macular microvasculature in patients with POAG.
- To determine the structure-function correlation between localized visual field defects and macular microvascular damage in matching sectors.
Main Methods:
- Optical coherence tomography angiography (OCTA) was used to measure macular vascular density in superior, inferior, temporal, and nasal sectors in 58 POAG patients and 27 controls.
- Automated perimetry was employed to assess visual field (VF) sensitivity in 16 central points, divided into the same four sectors.
- Structure-function correlation analysis was performed between VF sensitivity and macular vascular density.
Main Results:
- Vascular densities in all sectors were significantly decreased in the POAG group compared to controls.
- A moderate structure-function correlation was found between VF sensitivity and macular vascular density (correlation coefficients 0.295–0.433, P < 0.01).
- The inferior sector showed the best fit for the correlation model.
Conclusions:
- POAG patients exhibit decreased parafoveal retinal vascular density compared to controls.
- A moderate correlation exists between visual field sensitivity thresholds and macular vascular density assessed by OCT.
- These findings highlight the impact of POAG on macular microvasculature and its relationship with visual field defects.
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