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A Chinese boy who has the almost superhero ability to see in the dark has stunned doctors.
Nong Yousui's "cat's eyes" glow in the dark and enable him to see and read perfectly without any light.
His condition puzzled eye specialists who reported that his eyes let off a greenish light when a light was shone into them - in the same way as a cat's do.
Doctors discovered Yousui's unique gift after his father, Nong Shihua, took him to hospital in Dahua, southern China, concerned over his bright blue eyes.
Nong said: "They told me he would grow out of it and that his eyes would stop glowing and turn black like most Chinese people but they never did."
Following a series of medical tests, experts believe that Yousui suffers from rare condition called leukodermia which has left his eyes with less protective pigment and made them more sensitive to light.
The young boy recently demonstrated his X-Men-worthy skills by competing a test in a blacked-out stairwell.