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Comparison of vessel density in macular and peripapillary regions between primary open-angle glaucoma and pseudoexfoliation glaucoma using OCTA

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Abstract

Purpose

The aim of our study was to compare macular and peripapillary vessel density using optical coherence tomography angiography (OCTA) between eyes with primary open-angle glaucoma (POAG) and pseudoexfoliation glaucoma (PXG).

Methods

Thirty-six POAG and 34 PXG eyes with similar visual field defect (no statistically significant difference between average mean deviation and pattern standard deviation scores) were included. Macular superficial vessel density (msVD) in the superficial macular layer and foveal avascular zone (FAZ) parameters were assessed with (6 × 6 mm) and peripapillary vessel density (ppVD) in the radial peripapillary capillary (RPC) with (4.5 × 4.5 mm) OCTA scans. Area under the receiver operating curve was used for assessing diagnostic capability.

Results

In PXG group, all msVD parameters had lesser values, and especially in parafoveal region, statistically significant decrease was shown (p = 0.008) in all subdivisions except nasal (p = 0.053). FAZ area was more larger in PXG [0.32(0.25–0.36)] than POAG [0.28(0.22–0.39)],(p = 0.944). FAZ density − 300 μm had statistically significant decrease in PXG (47.22 ± 6.92) according to POAG groups (50.63 ± 7.25) (p = 0.048). Most of RPC VD parameters had decreasing values in PXG group (p > 0.05). VDs and corresponding thicknesses had significant remarkable positive correlation in both macular and peripapillary regions. Significant remarkable negative correlations were observed between fovea VD and FAZ area, FAZ perimeter and between fovea thickness and FAZ area, FAZ perimeter.

Conclusion

PXG eyes were found to have lesser values in terms of VD in the macular area, especially in the parafoveal and FD-300 regions, compared to POAG eyes which had similar functional and structural glaucomatous damage. Patients whose etiology was PXG and who seemed to have the same functional damage as those with POAG were actually found to have greater macular vascular damage. In addition, it was observed that macular vascular parameters correlated with peripapillary vascular parameters.

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Authors and Affiliations

  1. Medical Faculty Department of Ophthalmology, Kocaeli University, Gazanfer Bilge Bulvarı Akçakent 2 Sitesi C4/15, İzmit, Kocaeli, Turkey

    Sevgi Subasi, Nursen Yuksel, Ece Basaran & Dilara Pirhan

Authors
  1. Sevgi Subasi
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  2. Nursen Yuksel
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  3. Ece Basaran
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  4. Dilara Pirhan
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Correspondence to Sevgi Subasi.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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Subasi, S., Yuksel, N., Basaran, E. et al. Comparison of vessel density in macular and peripapillary regions between primary open-angle glaucoma and pseudoexfoliation glaucoma using OCTA. Int Ophthalmol 41, 173–184 (2021). https://doi.org/10.1007/s10792-020-01564-5

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  • DOI: https://doi.org/10.1007/s10792-020-01564-5

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