Retinal Neurovascular Impairment in Patients with Essential Hypertension: An Optical Coherence Tomography Angiography Study

Figures

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  Figure 1.. Layer identification and automatic segmentation using the AngioVue 2.0. (A) RNFL layer and its topographic map. (B) The 4.5 × 4.5-mm2 peripapillary area was divided into temporal, nasal, superior, and inferior quadrants, and each quadrant was then separated into two embedding areas. (C) A 6 × 6-mm2 macula area was split into segments based on distance to fovea; the parafoveal area was a concentric circle 1 mm to the fovea, and the perifoveal area was a concentric circle 1.5 mm to the parafovea. (D) The RPC layer was segmented into arteriovenous vessels (E) and capillaries (F). Vessel density was calculated separately.

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  Figure 2.. Superior RNFL thickness in patients with well-controlled or poorly controlled blood pressure in different grades of hypertensive retinopathy.