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. 2022 Oct 6;8:42. doi: 10.1038/s41526-022-00228-1

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Fig. 1 — Both MRI (a) and US (b) are represented in the figure. Note the measurement was conducted on a plane where the hypoechoic arachnoid and dural layer are clearly distinguished from the hyperechoic retroorbital face and subarachnoid space. R Retina, LC lamina cribrosa, ON optic nerve, SAS subarachnoid space, D dura.