Scientists have developed special spectacles that allow someone to see in the full spectrum of light.
The glasses are aimed at people who suffer from red-green colour blindness, a genetic abnormality that is thought to affect up to 10% of men and a small percentage of women. The spectacles were originally developed for the purpose of increasing the ability to see oxygenated blood in the skin but it was later found that they were also able to help people with colour-blindness see in the full range of colours.
"Most mammals - your dog, horse, bunny - have two dimensions of colour," said evolutionary neurobiologist Mark Changizi. "A yellow-blue dimension, and a grayscale (or brightness) dimension. Some of us primates, however, have an extra dimension of colour vision: The red-green dimension."
"The high tech glasses help those with "red-green deficiency", an inability to see some red and green colours."
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