"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."
For those not familiar with the British vernacular, chips are french fries and crisps are potato chips.
The teen was neither over- nor underweight, but he was malnourished, the report states, and suffered from avoidant-restrictive food intake disorder.
His sight had diminished to the point that he met the criteria for being registered blind.
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"He had blind spots right in the middle of his vision," Atan told the BBC. "That means he can't drive and would find it really difficult to read, watch TV or discern faces.
"He can walk around on his own though because he has got peripheral vision."
The teen's nutritional optic neuropathy could have been treated if caught early, the study states. But when left too long, the nerve fibers in the optic nerve die, and the damage becomes permanent.
Atan told the BBC this case is an example of the harm cause by kids being picky eaters.
"It's best not to be anxious about picky eating, and instead calmly introduce one or two new foods with every meal,” she said.
And although supplements can help, she said, they are not a substitute for a healthy and varied diet.
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