A teenage boy in the UK has gone blind after eating nothing but French fries, Pringles, white bread, and processed ham and sausage. The patient kid was low on vital nutrients such as B12 and vitamin D.
It only took three years before the vision damage became permanent.
Bristol Medical School and the Bristol Eye Hospital examined the teenager's case, and are now encouraging doctors everywhere to ask patients about their diet history.
For more info, read CNN's article.