His doctor reported, “His diet was essentially a portion of chips from the local fish and chip shop every day. He also used to snack on crisps – Pringles – and sometimes slices of white bread and occasional slices of ham, and not any fruit and vegetables.
“He explained this as an aversion to certain textures of food that he really could not tolerate, and so chips and crisps were really the only types of food that he wanted and felt that he could eat”
It's a very rare case of ARFID (avoidant-restrictive food intake disorder) reported in the journal Annals of Internal Medicine
"The risks for poor cardiovascular health, obesity, and cancer-associated with junk food consumption are well known, but poor nutrition can also permanently damage the nervous system, particularly vision. It is rare in developed countries. The condition is potentially reversible if caught early. But if left untreated, it leads to permanent blindness."