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Background: To assess alterations of choroid by enhanced depth imaging optical coherence tomography (EDI-OCT) in coronavirus disease 2019 (COVID-19).Methods: Thirty-two patients with COVID-19 infection (group 1) and 34 healthy subjects (group 2) were included in this study. The choroidal thickness was measured at three points: Subfoveal, 1500 mm nasal from the fovea, and 1500 mm temporal from the fovea. Total choroidal area, luminal area, stromal area and choroidal vascular index (CVI) wasdoi:10.21203/rs.3.rs-97433/v1 fatcat:vrjcxh2bfjeivnhdk3xtfg74y4