title: Optic neuropathy in vitamin B12 deficiency.
abstract: There are many neurological manifestations of vitamin B(12) deficiency. Optic neuropathy is a rare, but important, manifestation of vitamin B(12) deficiency that should be suspected in patients with risk factors for malnutrition. We present a case of a 68-year-old male who presented with bilateral decreased central vision for months and was found to have a low vitamin B(12) level. After a few months, his vision improved with parenteral vitamin B(12) supplementation. Vitamin B(12) optic neuropathy is a reversible, treatable cause of vision loss and may be a harbinger for other manifestations of the disease.
authors.affiliation: Department of Ophthalmology, Cole Eye Institute/Desk I-32, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
authors.forename: Sai H
authors.initials: SH
authors.lastname: Chavala
authors.forename: Gregory S
authors.initials: GS
authors.lastname: Kosmorsky
authors.forename: Mina K
authors.initials: MK
authors.lastname: Lee
authors.forename: Michael S
authors.initials: MS
authors.lastname: Lee