The researchers concluded: “This is a frank case of optic neuropathy in a patient with vitamin B12 deficiency due to a massive small bowel resection.”
Symptoms of vitamin B12 deficiency
The NHS confirms “disturbed vision” is one symptom caused by a vitamin B12 deficiency.
Others include depression, irritability, and changes in the way you walk and move around.
Additionally, some people may experience mouth ulcers, pins and needles, and a pale yellow tinge to the skin.