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Background/aim: This study aimed to investigate the effects of two different medical treatment options on choroidal thickness (CT) in patients with primary hypertension. Materials and methods: Forty newly diagnosed primary hypertension patients and 21 healthy volunteers were included. The patients were randomly divided into two subgroups. Group I started on perindopril arginine and Group II started on amlodipine. Submacular CT using optical coherence tomography (OCT) was measured before treatment and at the third and sixth months after treatment. Results: Initial mean arterial pressure (MAP) values in Groups I and II and the control group were 113.4, 109.8, and 89.4 mmHg, respectively, and mean CT values were 257.9, 286.5, and 300.9 µm. Mean MAP values in Groups I and II and the control group at the sixth month after treatment were 99.7, 99.6, and 90.2 mmHg, respectively, and mean CT values were 293.1, 286, and 297.4 µm. Analysis of the changes occurring during the study revealed significant variation in MAP in Groups I and II, and in CT in Group I only. Conclusion: A gradual increase in CT developed with perindopril arginine therapy in patients with primary hypertension, while no significant change occurred in CT in the amlodipine group.

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