A teenager from Bristol, England who only consumed chips, pringles and processed ham for sustenance has gone blind.
The fussy-eater had not consumed fruit or vegetable in a decade and eventually went blind because of a lack of vitamins in his diet.
The IT student, 19, who had to drop out of college, lost his sight over the course of three years, starting when he was 14.
According to reports, the lack of vital nutrients caused irreversible damage to the nerve in the back of his eyes.
His condition is known as Nutritional Optic Neuropathy (NON). It is a painless condition in which the vision decreases gradually.
The disturbing story was revealed by medics at Bristol Eye Hospital in the Annals of Internal Medicine's case reports.
It's lead author Dr Denize Atan told MailOnline: 'He has only eaten chips, Pringles, sausages and other processed foods since he was primary school age.
'He was clearly getting enough calories, but not nutrients. When the problems started he seemed, on the outside, like a healthy 14-year-old boy.
'His family actually bought him the chips because if he didn't eat them then he wouldn't eat anything. They tried hard to introduce veg and fruit to his diet.
'He is now registered blind and can only read top letter on an optician chart. He also has a blind spot in the middle of his eyes.
'He has maintained his peripheral vision, so he is still able to navigate. But he has caused permanent damage to the optic nerve, which can't repair itself.'
The condition has massively affected the teenager's social life.
He told the Times: 'I've become very isolated. When I was little I'd go out and play football with my friends. I'm too frightened to do that now.'
His mother had to quit her pub job to look after him.
She told the Telegraph: 'His sight went downhill very fast - to the point where he is now legally blind.
'He has no social life to speak of now. After leaving school he got into college to do a course in IT. But he had to give it up because he could not see or hear anything.
'He would love a job - but he has not been able to find anything he can do. I had to quit my job in a pub. I now look after him full-time.'
However, ever after losing his vision, the teenager has still not changed his diet but is receiving treatment for an eating disorder and is taking vitamin supplements.