How well can you
Did you know that ...
the color blind can see in the dark?
They cannot see in total darkness, but they can distinguish details at a much lower light level than people with normal color vision.Continue to next image
Did you know ...
who discovered color blindness?
John Dalton was the first to investigate color blindness and was color blind himself.
His diagnosis was confirmed in 1995, some 150 years after his death, by DNA analysis of his preserved eyeball, which he had donated to science.