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Abstract #98530 Published in IGR 22-4
Combining vascular and nerve fiber layer thickness measurements to model glaucomatous focal visual field loss
Kallab M; Hommer N; Schlatter A; Chua J; Tan B; Schmidl D; Hirn C; Findl O; Schmetterer L; Garhöfer G; Wong DAnnals of the New York Academy of Science 2022; 1511: 133-141
We compare the focal structure-function correlation of structural measurements of peripapillary retinal nerve fiber layer thickness (RNFL-T) using optical coherence tomography (OCT), capillary density (CD) measurements using OCT-angiography (OCT-A), or a combination of both, with visual field deviation (VFD) in early to advanced glaucoma. Primary open angle glaucoma patients (n = 46, mean ± SD age: 67 ± 10 years; VF mean deviation: -10.41 ± 6.76 dB) were included in this cross-sectional study. We performed 30-2 standard automated perimetry OCT (3.5-mm diameter ring scan) and 15°×15° OCT-A (superficial vascular complex slab). Based on a nerve fiber trajectory model, each VF test spot was assigned to an OCT-A wedge and an OCT ring-sector. Two univariate linear models (M and M ) using either CD-based vascular (M ) or RNFL-T-based thickness information (M ) and one multivariate model using both (M ) were compared in their associations with measured focal VFD, which were higher for the multivariate model M (mean ± SD correlation coefficient: 0.710 ± 0.086) than for either nested model (0.627 ± 0.078 for M and 0.578 ± 0.095 for M ). Using a focal visual field approach, the combination of RNFL-T and CD showed better structure-function correlations than thickness or vascular information only.
Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria.
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