Abstract
Purpose
To evaluate the relationship between choriocapillaris (CC), flow deficits (FD), and structural optical coherence tomography (OCT) biomarkers, and the progression of intermediate age-related macular degeneration (iAMD) to complete retinal pigment epithelial and outer retinal atrophy (cRORA) or macular neovascularization (MNV).
Methods
Consecutive patients with iAMD were sequentially reviewed to define three equal sized groups: progressed to MNV, progressed to cRORA, or remained stable over 12 months of follow-up. Odds ratios for progression to cRORA and MNV were estimated by logistic regression for intraretinal hyperreflective foci (IHRF), hyporeflective drusen cores (hDC), subretinal drusenoid deposits (SDDs), high central drusen volume, fellow eye with late AMD, and peripheral and central CC FD.
Results
Thirty iAMD eyes from 30 patients were enrolled into each group. The CC FD was greater in the peripheral sectors of the macula of eyes which progressed to cRORA compared to the other two groups (P < 0.0001). The central CC FD was also significantly impaired in eyes that progressed to cRORA or MNV compared to eyes that did not progress (P = 0.001 and P = 0.02, respectively). CC FD in the peripheral macula was significantly and independently associated with the development of cRORA, while CC FD in the center was significantly and independently associated with the development of MNV.
Conclusions
While the CC is diffusely impaired throughout the macula in iAMD eyes that progress to cRORA, it is relatively spared in the more peripheral macula among eyes which progress to MNV. These differential findings may have implications for the pathophysiology of the different late-stage manifestations of AMD.
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Data availability
All data relevant to the study are included in the article or uploaded as supplementary information.
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FC: study conception, design, analysis, data acquisition, interpretation of data, drafting and revising, final approval. GC, LT, JAM, and TKL: data acquisition and data analysis, revising, and final approval. SRS: study conception, design, interpretation of data, drafting and revising, final approval.
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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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Conflict of interest
F. Corvi, G. Corradetti, L. Tiosano, J.A. McLaughlin, T.K. Lee declare no conflict of interest. S.R. Sadda reports consulting fees from Amgen, Allergan, Regeneron, Roche/Genentech, Novartis, Merck, 4DMT, Optos, Heidelberg, and Centervue. He also receives research instruments from Topcon, Nidek, Heidelberg, Centervue, Optos, and Carl Zeiss Meditec, outside the submitted work.
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Supplemental Figure 1.
Scatter plot showing the duration of the follow-up visit (in months) on the y-axis and the individual subject on x-axis for each group: intermediate age-related macular degeneration (iAMD) patients who remained stable over follow-up (black dot), iAMD who progressed to MNV (white square), and iAMD who progressed to cRORA (white dot) (PNG 7661 kb)
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Corvi, F., Corradetti, G., Tiosano, L. et al. Topography of choriocapillaris flow deficit predicts development of neovascularization or atrophy in age-related macular degeneration. Graefes Arch Clin Exp Ophthalmol 259, 2887–2895 (2021). https://doi.org/10.1007/s00417-021-05167-3
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DOI: https://doi.org/10.1007/s00417-021-05167-3