BMJ Case Reports 2011; doi:10.1136/bcr.02.2011.3823
  • Other full case

Vitamin B12 deficiency optic neuropathy detected by asymptomatic screening

  1. Peter Scanlon
  1. Gloucestershire Eye Unit, Cheltenham, Gloucestershire, UK
  1. Correspondence to Dr Colin Chu, colin.chu{at}


Asymptomatic bilateral optic disc swelling was detected in a 19-year-old man with type 1 diabetes through routine photographic screening for retinopathy. He was found to have significant vitamin B12 deficiency which the authors believe was the cause for the optic neuropathy. After B12 replacement, visual function and optic disc appearances returned to normal.


  • Competing interests None.

  • Patient consent Obtained.

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