RT Journal Article SR Electronic T1 Isolated optic neuropathy due to folate deficiency with associated iron overload JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e242399 DO 10.1136/bcr-2021-242399 VO 14 IS 7 A1 Pique, Karina A1 Taber, William A1 Thompson, Anthony A1 Maitland, Charles Gerry YR 2021 UL http://casereports.bmj.com/content/14/7/e242399.abstract AB Isolated optic neuropathy due to folate deficiency is rarely reported. Poor dietary practices, malabsorption, and tobacco/alcohol abuse are usually responsible. We examined a patient with blinding optic neuropathies and isolated folic acid deficiency. Visual acuity recovered after folate replacement. At the same time, serological investigation revealed high ferritin and iron saturation levels with negative genetic markers for haemochromatosis consistent with the diagnosis of iron overload syndrome. There are no reports of blindness associated with iron overload syndrome.