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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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Characterizing and quantifying the temporal relationship between structural and functional change in glaucoma
Fang-I Chu1,2, Lyne Racette1,3
1Eugene and Marilyn Glick Eye Institute, Indiana University, Indianapolis, IN, United States of America.
Plos One
|April 1, 2021
Summary
The relationship between structural and functional changes in glaucoma varies by patient. Analyzing the structure-function (SF) relationship at an individual level is crucial for accurate glaucoma progression modeling.
Area of Science:
- Ophthalmology
- Neuroscience
- Medical Imaging
Background:
- Glaucoma is a progressive optic neuropathy characterized by structural damage and functional vision loss.
- Understanding the temporal relationship between structural and functional changes is key to monitoring disease progression.
Purpose of the Study:
- To characterize and quantify the temporal relationship between structural (rim area) and functional (mean sensitivity) changes in glaucoma patients.
- To investigate if structural changes precede, follow, or occur simultaneously with functional changes.
Main Methods:
- 120 patients with ocular hypertension or primary open-angle glaucoma were followed for 5-10 years with 11 visits.
- Rim area (RA) and mean sensitivity (MS) were measured at each visit.
- Cross-correlation functions (CCFs) and lagging regression analysis were used to assess the structure-function (SF) relationship and temporal lags.
Main Results:
- The strongest structure-function (SF) correlation varied across patients, with different temporal lags (simultaneous, structure preceding function, or function preceding structure).
- Lagging regression analysis revealed significant differences in the visit lag relationship within these patient groups (p<0.0001).
Conclusions:
- The temporal relationship between structure and function in glaucoma is patient-specific.
- Jointly modeling glaucoma progression requires addressing the structure-function (SF) relationship at the individual subject level.
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