smokeless tobacco damage #DYK? products cause cancer of the mouth, esophagus, and pancreas. They can also cause problems in the mouth, like gum disease or tooth decay. Ditch the chew today: CDC.gov/quit The faces of smokeless tobacco
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I hope one day we can have a pipe in a cab

In some cases, a Vitamin B12 deficiency can also cause visual disturbances such as photopsia, as well as other visual symptoms such as blurred vision, double vision, and color vision changes

Gable, Donna (November 4, 1992)

pp 289302
Journal of Clinical Epidemiology 64(12):12941302
