Journal of Medical Case Reports Abstract 1752-1947-2-77 Malnutrition and bilateral central retinal vein occlusion in a young woman: a case report:
This report suggests that deficiency in Vitamin B12 and folate can increase risk of CRVO due to elevated homocysteine levels. It concludes:
"Vitamin B12 and folate deficiency can lead to elevated levels of homocysteine. We found a large amount of published data relating central retinal vein occlusion to elevated homocysteine levels, but there was a lack of conclusive evidence for this association Patients should be asked about their dietary history where a thrombotic event is suspected or confirmed."