A teen in the UK who has eaten nothing but french fries, potato chips and white bread since elementary school is now blind because of vitamin deficiencies and malnutrition damage. The boy was taken to his doctor at 14 because he felt tired. He was diagnosed with macrocytic anemia and a vitamin B12 deficiency and prescribed supplements, according to a study published Tuesday in the Annals of Internal Medicine. He neither stuck with the vitamins nor changed his diet, however, and his condition worsened.Three years later, he was taken to the Bristol Eye Hospital with reported vision loss.According to the...