An unnamed 19-year-old from Bristol, in the United Kingdom, has lost his vision permanently due to a nearly lifelong diet of fries, chips, white bread, meat, and other processed snacks, The Guardian reports. The teen suffers from an eating disorder called Arfid, or avoidant restrictive food intake disorder, which makes him unable to stomach the texture of fruits or vegetables. According to The Guardian, the teen's diet, which is extremely low in B-12 and other vital nutrients, has led to nutritional optic neuropathy, damaging fibers in his optic nerve. Head over to The Guardian to learn more about this eating disorder, and to hear from the teen's family.