title: Masquerading optic neuritis.
abstract: A 54-year-old woman presented to the ophthalmology emergency department with a 10-day history of blurred vision. The best-corrected visual acuities and Ishihara colour vision were bilaterally reduced with a left relative afferent pupillary defect. Slit-lamp examination was otherwise normal. Retrobulbar optic neuritis (ON) was presumed as she had suffered with this previously and was known to have multiple sclerosis (MS). She was recalled the following week for visual field (VF) testing, which was not available at the time of presentation. VFs demonstrated an incongruous left homonymous hemianopia. She was immediately referred to the medical team to investigate for a stroke, which was subsequently excluded. Thereafter, a trial of pulsed methylprednisolone was commenced, resulting in near complete resolution of the hemianopia. This case demonstrates not only the importance of VF testing, but also how ON may present with any field defect, including mimicking a stroke, a point valuable to ophthalmologists and medics alike.
authors.affiliation: Department of Ophthalmology, Bristol Eye Hospital, Bristol, UK.
authors.forename: Katherine
authors.initials: K
authors.lastname: McVeigh
authors.affiliation: Department of Ophthalmology, Queen's Hospital Romford, Romford, Essex, UK.
authors.forename: Georgios
authors.initials: G
authors.lastname: Vakros
authors.affiliation: Department of Ophthalmology, Bristol Eye Hospital, Bristol, UK.
authors.forename: Rafik
authors.initials: R
authors.lastname: Girgis
mesh_terms: D005260:Female; D005938:Glucocorticoids / Q000627:therapeutic use; D006423:Hemianopsia / Q000175:diagnosis* / Q000188:drug therapy / Q000209:etiology; D006801:Humans; D008775:Methylprednisolone / Q000627:therapeutic use; D008875:Middle Aged; D020529:Multiple Sclerosis, Relapsing-Remitting / Q000150:complications*; D009902:Optic Neuritis / Q000150:complications / Q000175:diagnosis* / Q000188:drug therapy; D011681:Pupil Disorders / Q000175:diagnosis* / Q000188:drug therapy / Q000209:etiology; D020521:Stroke / Q000175:diagnosis*; D014792:Visual Acuity; D058609:Visual Field Tests; D014794:Visual Fields
chemical_list: D005938:Glucocorticoids; D008775:Methylprednisolone