Ultrasound pupillometry for the detection of a relative afferent pupillary defect (RAPD): Systematic evaluation in patients with optic neuritis and comparison with infrared video pupillometry - Franziska Siebald; Ulrike Grittner; Carolin Otto; Charlotte Bereuter; Hanna G. Zimmermann; Lutz Harms; Jan Klonner; Stephan J. Schreiber; Friedemann Paul; Klemens Ruprecht; Felix A. Schmidt (PLoS ONE, 2025)