Abstract
The purpose of the study was to evaluate the retinal and choroidal changes via optical coherence tomography angiography (OCTA) in patients who received hydroxychloroquine (HCQ). Sixty eyes of 60 female patients who received HCQ were included in the study. Patients were categorized into two groups as high-risk (≥ 5 years) and low-risk (< 5 years) in terms of HCQ-induced retinal toxicity. Spectral domain-OCT, OCTA, and visual field tests were performed. Retinal thickness, vascular density, flow rates, choroidal thickness (CT), and visual field parameters were compared between the groups, and the correlation between total HCQ cumulative dose, duration of use, and these parameters was assessed. Compared to low-risk group, patients in the high-risk group had vascular density loss (p < 0.05). In this group, foveal avascular zone (FAZ) was found to be wider (p < 0.05). Retinal and choroidal flow rates were found to be decreased markedly in the high-risk group (p < 0.05). CT was found to be thinner in the high-risk group (p < 0.05). HCQ cumulative dose and duration of use had a negative significant correlation with all vascular density, flow rate, CT parameters, and positive significant correlation with FAZ parameters (p < 0.05). In vi...Continue Reading
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