RT Journal Article SR Electronic T1 A man with blurred vision and headache JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 574 OP 616 DO 10.1136/emermed-2021-211995 VO 39 IS 8 A1 Yen-Chiang Lee A1 Yu-Chang Liu A1 Wei-Jing Lee YR 2022 UL http://emj.bmj.com/content/39/8/574.abstract AB