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Updated: Jun 24, 2026
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Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
Scanning laser polarimetry with variable corneal compensation to detect preperimetric glaucoma using logistic
Ana Sánchez-Cano1, Begoña Baraibar, Luis E Pablo
1Department of Applied Physics, Science Faculty, Zaragoza University, Zaragoza, Spain. anaisa@unizar.es
Summary
A new function enhances the scanning laser polarimetry with variable corneal compensation (GDx-VCC) nerve fiber analysis for detecting preperimetric glaucoma. This improved diagnostic reliability aids in identifying early retinal nerve fiber layer damage.
Area of Science:
- Ophthalmology
- Medical Imaging
- Glaucoma Diagnostics
Background:
- Preperimetric glaucoma detection remains a challenge.
- Scanning laser polarimetry with variable corneal compensation (GDx-VCC) is an established tool.
- Early identification of retinal nerve fiber layer (RNFL) defects is crucial for preventing vision loss.
Purpose of the Study:
- To evaluate a novel function for the GDx-VCC system.
- To assess the improved capability in detecting preperimetric glaucoma.
- To analyze performance across 12 peripapillary RNFL sectors.
Main Methods:
- Cross-sectional study of 478 glaucoma suspects (391 normal, 60 with RNFL defects).
- Comprehensive ophthalmological exams including static automated perimetry and optic nerve photography.
- GDx-VCC examination with a new linear discriminating function was performed.
Main Results:
- The new function showed significantly lower mean values in eyes with RNFL defects.
- Key parameters like inferior average and superior average were affected.
- Receiver-operating characteristic analysis demonstrated a 5% improvement in area under the curve compared to standard GDx-VCC.
Conclusions:
- The new GDx-VCC function offers enhanced diagnostic reliability for preperimetric glaucoma.
- Morphological diagnosis of early RNFL damage is confirmed as valuable.
- This advancement aids in earlier and more accurate glaucoma detection.
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